CMS-10250. OQR_v17.0_SpecsManual

Hospital OQR Program Specifications Manual Release Notes version 17.0
Note: All information found in the release notes reflect changes made to the specification manual version as
indicated.
Hospital Outpatient Quality Reporting Specifications Manual
Release Notes Version: 17.0
Release Notes Completed: June 28, 2023
Guidelines for Using Release Notes
Release Notes provide modifications to the Hospital Outpatient Quality Reporting (OQR) Specifications
Manual. They are provided as a reference tool and are not intended to be used as program abstraction tools.
Please refer to the Hospital OQR Specifications Manual for the complete and current technical specifications
and abstraction information.
The notes are organized to follow the order of the Table of Contents. Within each topic section, a row
represents a change that begins with general changes and is followed by data elements in alphabetical order.
The implementation date is 01/01/2024, unless otherwise specified. The row headings are described
below:
•

Impacts – Used to identify which portion(s) of the Manual Section is impacted by the changes listed.
Examples are Alphabetical Data Element List, Alphabetical Data Dictionary, Measure Information Form
(MIF), and Flowchart (Algorithm). If any changes are made to a data element, the measure(s) affected
are identified also.

•

Rationale – Provided for the change being made.

•

Description of Changes – Used to identify the section within the document where the change occurs.
Examples are Definition, Data Collection Question, Allowable Value, and Denominator Data elements.

Data elements that cross multiple measures and contain the same changes are consolidated into one row. If
those changes do not apply to all the measures listed in the Impacts row, the Description of Changes row
identify the applicable measures.

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Hospital OQR Program Specifications Manual Release Notes version 17.0

Table of Contents
Impacts: Acute Myocardial Infarction (AMI) – OP-2 and OP-3
Rationale: This change removes the AMI Measure Set, Section 1.1: Acute Myocardial Infarction (AMI) –
OP-2 and OP-3. In the Calendar Year (CY) 2022 OPP/ASC Final Rule it was finalized to remove
Fibrinolytic Therapy Received Within 30 Minutes of Emergency Department (ED) Arrival (OP–2); and
Median Time to Transfer to Another Facility for Acute Coronary Intervention (OP–3) from the Hospital
OQR Program.
Description of Change(s):
Remove: Section 1.1: Acute Myocardial Infarction (AMI) – OP-2 and OP-3 Measure Set
Program Background
Impacts: Related National Activities
Rationale: This change removes language specific to NQF and provides language to stakeholders on the
standard measure adoption process for the OQR program, as defined in the Medicare Improvements and
Extension Act under Division B of Title I of the Tax Relief and Health Care Act (MIEA-TRHCA) of 2006
and to include reference information regarding Electronic Clinical Quality Measures (eCQMs) and the
Outpatient and Ambulatory Surgery Consumer Assessment (OAS CAHPS) for the Hospital OQR Program.
Description of Change(s):
Change From:
National Quality Forum (NQF)
The NQF has approved a set of national voluntary consensus standards for measuring the quality of hospital
care. These measures will permit consumers, providers, purchasers, and quality improvement professionals
to evaluate and compare the quality of care in a variety of healthcare settings across the nation by using a
standard set of measures. Measures that are endorsed by NQF are denoted as such on the measure
information forms.
To:
Measure Development
Sections 1833(i)(7)(B) and 1833(t)(17)(C)(i) of the Act, requires the Secretary to develop measures
appropriate for the measurement of the quality of care furnished by hospitals in outpatient settings, and that
measures reflect consensus among affected parties. Measures are not required to be endorsed by any national
consensus-based entity. Consensus among affected parties can be achieved in other ways, including input
from the consensus-based entity’s measure review process, measure development process, through broad
acceptance and use of the measure(s), and through public comment.

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Hospital OQR Program Specifications Manual Release Notes version 17.0
Add:
Electronic Clinical Quality Measures (eCQM)
Beginning with Calendar Year (CY) 2023 reporting period, hospitals were provided the opportunity to
voluntarily submit data for OP-40: ST-elevation myocardial infarction (STEMI), an electronic clinical
quality measure (eCQM), in the OQR program. eCQMs were developed specifically to allow an electronic
health record (EHR) system certified to the Office of the National Coordinator (ONC) standards to capture,
export, calculate, and report measure data.
Beginning with CY 2024 reporting period, hospitals will be required to report one self-selected calendar
quarter of data. For CY 2025 reporting period the requirement increases to two self-selected calendar
quarters of data, followed by three required quarters in CY 2026 and all four quarters beginning with CY
2027 reporting period. For more information on the adoption of OP-40 eCQM, please refer to the CY 2022
OPPS/ASC Final Rule, beginning on page 63837, published in the Federal Register.
Refer to the Technical Specifications and Resources for the CMS Quality Reporting Document Architecture
(QRDA) Category I Implementation Guide for the applicable reporting period, measure specification
information, and program resources to support successful eCQM reporting on the eCQI Resource Center.
Outpatient and Ambulatory Surgery Consumer Assessment (OAS CAHPS)
The OAS CAHPS initiative was developed as a patient-experience-of-care survey for patients who had
surgery or a procedure at a hospital outpatient department (HOPD) or an ambulatory surgery center (ASC).
Prior to OAS CAHPS, there was no standardized survey instrument to assess patient experience with
outpatient surgical care received at HOPDs and ASCs. Hospitals contract with a CMS-approved OAS
CAHPS Survey vendor to conduct the survey. A list of approved survey vendors is available at the following
link: https://oascahps.org/General-Information/Approved-Survey-Vendors.
Beginning with CY 2023 reporting period, hospitals were provided the opportunity to voluntarily submit data
for the OAS CAHPS survey.
Beginning with CY 2024 reporting period, hospitals will be required to report quarterly data by the
submission deadlines provided on the OAS CAHPS website. Data deadlines are also available in Hospital
Outpatient Quality Reporting tab on QualityNet.cms.gov.
Outpatient Delivery Settings
Impacts: Acute Myocardial Infarction (AMI) – OP-2 and OP-3
Rationale: This change removes the Acute Myocardial Infarction (AMI): OP-2 and OP-3 and adds OP-37:
OAS CAHPS and OP-40: ST-elevation myocardial infarction (STEMI) eCQM.
Description of Change(s):
Remove: OP-2: Fibrinolytic Therapy Received Within 30 Minutes of ED Arrival
OP-3: Median Time to Transfer to Another Facility for Acute Coronary Intervention
Add:

OP-37: Outpatient and Ambulatory Surgery Consumer Assessment (OAS CAHPS)
OP-40: ST-elevation myocardial infarction (STEMI)

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Hospital OQR Program Specifications Manual Release Notes version 17.0

Section 1: Measure Information Forms
Impacts: Measure Information Form Format Overview
Rationale: This change finalizes the CY 2022 OPP/ASC Final Rule and removes Fibrinolytic Therapy
Received Within 30 Minutes of Emergency Department (ED) Arrival (OP–2); and Median Time to Transfer
to Another Facility for Acute Coronary Intervention (OP–3) from the Hospital OQR Program. Removal of
all references and guidance to these measures are therefore also removed from the Specifications Manual.
Description of Change(s):
Overview
Remove: OP-2 and OP-3 example from the Set Measure ID definition.
Impacts: Acute Myocardial Infarction (AMI) Measure Information Forms OP-2 and OP-3
Rationale: This change finalizes the CY 2022 OPP/ASC Final Rule and removes Fibrinolytic Therapy
Received Within 30 Minutes of Emergency Department (ED) Arrival (OP–2); and Median Time to Transfer
to Another Facility for Acute Coronary Intervention (OP–3) from the Hospital OQR Program.
Description of Change(s):
Remove: AMI measure set and Measure Information Forms OP-2 and OP-3
_____________________________________________________________________________________
Impacts: OP-8: Magnetic Resonance Imaging (MRI) Lumbar Spine for Low Back Pain
Rationale: This change expands the information within the Outpatient Imaging Efficiency (OIE) Measure
Information Forms (MIFs) to align with other Hospital Outpatient Quality Reporting (OQR) measures in the
Program’s Specifications Manual. This included adding static information such as numerator/denominator
statements, exclusions, rationale for the measures, interpretation of the measures, and a list of organizational
IDs.
Description of Change(s):
Please refer to the OP-8 Measure Information Form updates in the OQR v17.0 Specifications Manual. Due to
substantial additions, these updates are not listed here in the Release Notes. All edits and additions are
highlighted within the measure form, the added tables are not highlighted due to contrast.
_____________________________________________________________________________________
Impacts: OP-10: Abdomen Computed Tomography (CT) – Use of Contrast Material
Rationale: This change expands the information within the Outpatient Imaging Efficiency (OIE) Measure
Information Forms (MIFs) to align with other Hospital Outpatient Quality Reporting (OQR) measures in the
Program’s Specifications Manual. This included adding static information such as numerator/denominator
statements, exclusions, rationale for the measures, interpretation of the measures, and a list of organizational
IDs.
Description of Change(s):
Please refer to the OP-10 Measure Information Form updates in the Hospital OQR v17.0 Specifications
Manual. Due to substantial additions, these updates are not listed here in the Release Notes. All edits and
additions are highlighted within the measure form, the added tables are not highlighted due to contrast.
_____________________________________________________________________________________
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Hospital OQR Program Specifications Manual Release Notes version 17.0
Impacts: OP-13: Cardiac Imaging for Preoperative Risk Assessment for Non-Cardiac
Low-Risk Surgery
Rationale: This change expands the information within the Outpatient Imaging Efficiency (OIE) Measure
Information Forms (MIFs) to align with other Hospital Outpatient Quality Reporting (OQR) measures in the
Program’s Specifications Manual. This included adding static information such as numerator/denominator
statements, exclusions, rationale for the measures, interpretation of the measures, and a list of organizational
IDs.
Description of Change(s):
Please refer to the OP-13 Measure Information Form updates in the Hospital OQR v17.0 Specifications
Manual. Due to substantial additions, these updates are not listed here in the Release Notes. All edits and
additions are highlighted within the measure form, the added tables are not highlighted due to contrast.
_____________________________________________________________________________________
Impacts: OP-39: Breast Cancer Screening Recall Rates
Rationale: This change expands the information within the Outpatient Imaging Efficiency (OIE) Measure
Information Forms (MIFs) to align with other Hospital Outpatient Quality Reporting (OQR) measures in the
Program’s Specifications Manual. This included adding static information such as numerator/denominator
statements, exclusions, rationale for the measures, interpretation of the measures, and a list of organizational
IDs.
Description of Change(s):
Please refer to the OP-39 Measure Information Form updates in the Hospital OQR v17.0 Specifications
Manual. Due to substantial additions, these updates are not listed here in the Release Notes. All edits and
additions are highlighted within the measure form, the added tables are not highlighted due to contrast.
_____________________________________________________________________________________
Impacts: OP-32: Facility 7-Day Risk-Standardized Hospital Visit Rate after Outpatient Colonoscopy
Rationale: The changes are non-substantive and reflect formatting updates for consistency and to update
links referenced through the measure form.
Description of Change(s):
Introduction
Change From: This measure was developed by a team of clinical and statistical experts from the Yale New
Haven Health Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE),
under contract to CMS. The measure is currently endorsed by the National Quality Forum (NQF #2539).
To: This measure was developed by a team of clinical and statistical experts from the Yale New Haven
Health Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE), under
contract to CMS. The measure is currently [consensus-based-entity (CBE) endorsed (CMS Measures
Information Tool [CMIT] program-specific version number 00253-01-C-HOQR).
Measure Information Form
Reference links: Please refer to the Measure Information Form for updated reference links.
_____________________________________________________________________________________
Impacts: OP-35: Admissions and Emergency Department Visits for Patients Receiving Outpatient
Chemotherapy
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Hospital OQR Program Specifications Manual Release Notes version 17.0
Rationale: The changes are non-substantive and reflect formatting updates for consistency and to update
links referenced through the measure form.
Description of Change(s):
Introduction
Change From: This measure was developed by a team of clinical and statistical experts from the Yale New
Haven Health Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE),
under contract to CMS. The measure is currently undergoing initial endorsement review as part of the
National Quality Forum’s portfolio of cancer care measures.
To: This measure was developed by a team of clinical and statistical experts from the Yale New Haven
Health Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE), under
contract to CMS. The measure is currently undergoing initial endorsement review as part of the consensusbased entity (CBE) portfolio of cancer care measures.
Measure Information Form
Reference links: Please refer to the Measure Information Form for updated reference links.
___________________________________________________________________________________
Impacts: OP-36: Hospital Visits after Hospital Outpatient Surgery
Rationale: The changes are non-substantive and reflect formatting updates for consistency and to update
links referenced through the measure form.
Description of Change(s):
Introduction
Change From: This measure was developed by a team of clinical and statistical experts from the Yale New
Haven Health Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE),
under contract to CMS. The measure is currently endorsed by the National Quality Forum (NQF #2687).
To: This measure was developed by a team of clinical and statistical experts from the Yale New Haven
Health Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE), under
contract to CMS. The measure is currently [consensus-based entity (CBE) endorsed (CMS Measures
Information Tool [CMIT] program specific identifier 00344-01-C-HOQR).
Measure Information Form
Reference links: Please refer to the Measure Information Form for updated reference links.
_____________________________________________________________________________________

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Hospital OQR Program Specifications Manual Release Notes version 17.0
Impacts: OP-38: COVID-19 Vaccination Coverage Among Health Care Personnel (HCP COVID-19
Vaccination)
Rationale: This change to the Denominator and Numerator statement is to align with the most recent
guidance from the Centers for Disease Control and Prevention, National Healthcare Safety Network
(NHSN). Also, this change removes the FAQ link and replaces it with current definitions and link to
information on key terms and guidance provided by NHSN.
Description of Change(s):
Denominator Statement
Change:
From: Number of All Core HCP eligible to work in the ASC for at least one day during the self-selected
week, excluding persons with contraindications to COVID-19 vaccination.
To: Number of HCP eligible to work in the ASC for at least one day during the reporting period, excluding
persons with contraindications to COVID–19 vaccination that are described by the CDC.
Numerator Statement
Change:
From: Cumulative number of All Core HCP eligible to work in at the ASC for at least one day during the
self- selected week and who received a complete vaccination course against COVID-19 using an FDA
authorized or FDA-approved vaccine for COVID-19 (whether the FDA issued an approval or EUA).160 A
complete vaccination course is defined under the specific FDA authorization and may require multiple doses
or regular revaccination.
To: Cumulative number of HCP eligible to work in at the ASC for at least one day during the reporting
period and who received a complete vaccination course against COVID–19.
FAQ’s
Remove: FAQs on Reporting COVID-19 Vaccination Data can be found at
https://www.cdc.gov/nhsn/hps/weeklycovid-vac/faqs.html.
Add:
Definitions*: 
All Core HCP: Sum of Employees (staff on facility payroll), Licensed independent practitioners: Physicians,
advanced practice nurses, & physician assistants, and Adult students/trainees & volunteers. 
Complete Primary Series: Completing a primary vaccine series means receiving: 2-dose series of an mRNA
COVID-19 vaccine (Pfizer-BioNTech and Moderna), OR a single dose of Johnson & Johnson’s Janssen
COVID-19 vaccine. A complete vaccination course may require multiple doses or regular revaccination. 
Information on Key Terms and Up to Date Vaccination can be downloaded here:   
https://www.cdc.gov/nhsn/pdfs/hps/covidvax/UpToDateGuidance-508.pdf

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Hospital OQR Program Specifications Manual Release Notes version 17.0

Section 2: Data Dictionary
Impacts: Data Dictionary Introduction
Rationale: This update is to include language regarding specifications and data elements related to eCQM
measures and provide links for locating on the official eCQI site.
Description of Change(s):
Add:
Electronic Clinical Quality Measures (eCQM)
•

Refer to the Technical Specifications and Resources for the CMS Quality Reporting Document
Architecture (QRDA) Category I Implementation Guide for the applicable reporting period, measure
specification information including data elements, and program resources to support successful
eCQM reporting on the eCQI Resource Center.

•

For questions regarding eCQM specifications, value sets, and appropriateness of mapping, please
submit questions to the Office of the National Coordinator for Health Information Technology (ONC)
eCQM Issue Tracker at https://oncprojectracking.healthit.gov/support/projects/CQM/summary. The
eCQM Issue Tracker is an online database that allows for the submission and retrieval of questions
and answers based on the measure and keyword criterion.

Impacts: Alphabetical Data Element List and Data Dictionary
Rationale: Removal of all associated data elements from the Data Element List and Data Dictionary specific
to OP-2 and OP-3 measures and removal of reference to OP-2 and OP-3 measures in the ‘Collected For’
column of the Data Element List.
Description of Change(s):
Remove from Data Element List:
Fibrinolytic Administration
Fibrinolytic Administration Date
Fibrinolytic Administration Time
Initial ECG Interpretation
Reason for Delay in Fibrinolytic Therapy
Reason for Not Administrating Fibrinolytic Therapy
Transfer for Acute Coronary Intervention
Remove: OP-2, OP-3 from ‘Collected For’ column:
Discharge Code, E/M Code, ED Departure Date, ED Departure Time, ICD-10-CM Principal Diagnosis Code

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Hospital OQR Program Specifications Manual Release Notes version 17.0

Section 4: Population and Sampling Specifications
Impacts: Population and Sampling Specifications
Rationale: This change finalizes the CY 2022 OPP/ASC Final Rule and removes Fibrinolytic Therapy
Received Within 30 Minutes of Emergency Department (ED) Arrival (OP–2); and Median Time to Transfer
to Another Facility for Acute Coronary Intervention (OP–3) from the OQR program. Removal of all
references and guidance to these measures are therefore also removed from the Specifications Manual.
Description of Change(s):
Remove: All references to the AMI measure set (OP-2 and OP-3)
Appendices
Impacts: Appendix A
Rationale: This change finalizes the CY 2022 OPP/ASC Final Rule and removes Fibrinolytic Therapy
Received Within 30 Minutes of Emergency Department (ED) Arrival (OP–2); and Median Time to Transfer
to Another Facility for Acute Coronary Intervention (OP–3) from the OQR program.
Description of Change(s):
Remove: OP Table 1.1: Acute Myocardial Infarction (AMI) Diagnosis Codes

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Hospital Outpatient Quality Reporting
Specifications Manual
Version 17.0
Encounter Dates: 01-01-24 (1Q24) through 12-31-24 (4Q24)
OMB# 0938-1109 Expiration Date 02/28/2025

Table of Contents
Acknowledgement.............................................................................................................................................. i
Program Background .......................................................................................................................................ii
Using the Manual .......................................................................................................................................................... v
Outpatient Delivery Settings ....................................................................................................................................vii
Section 1: Measure Information Forms
MIF Format Overview .................................................................................................................................... 1-1
Section 1.1: ED-Throughput – OP-18 and OP-22
General Data Element List ............................................................................................................................. 1-6
Specific Data Element List ............................................................................................................................. 1-6
Population Algorithm ................................................................................................................................................. 1-8
Measure Information Forms
OP-18: Median Time from ED Arrival to ED Departure for Discharged ED Patients ............................. 1-10
OP-22: Left Without Being Seen .............................................................................................................. 1-17
Section 1.2: Stroke – OP-23
General Data Element List ........................................................................................................................... 1-18
Specific Data Element List ........................................................................................................................... 1-18
Population Algorithm ............................................................................................................................................... 1-20
Measure Information Form
OP-23: Head CT or MRI Scan Results for Acute Ischemic Stroke or Hemorrhagic Stroke Patients
who Received Head CT or MRI Scan Interpretation Within 45 Minutes of ED Arrival .......................... 1-22
Section 1.3: Imaging Efficiency – OP-8, OP-10, OP-13, OP-39
Measure Information Forms
OP-8: Magnetic Resonance Imaging (MRI) Lumbar Spine for Low Back Pain ...................................... 1-30
OP-10: Abdomen Computed Tomography (CT) – Use of Contrast Material ............................................... 1-33
OP-13: Cardiac Imaging for Preoperative Risk Assessment for Non-Cardiac Low-Risk Surgery ............ 1-36
OP-39: Breast Cancer Screening Recall Rates...…………………………………………………………1-40
Section 1.4: Measures Submitted Via a Web-Based Tool – OP-29, OP-31, OP-38
OP-29: Appropriate Follow-up Interval for Normal Colonoscopy in Average Risk Patients …………1-42
OP-31: Cataracts–Improvement in Patient’s Visual Function within 90 Days Following
Cataract Surgery………………………………………………………………………………………….1-44
OP-38: COVID-19 Vaccination Coverage Among Health Care Personnel…………………………… 1-46
Section 1.5: Outcome Claims-Based Measures – OP-32, OP-35, OP-36
OP-32: Facility 7-Day Risk-Standardized Hospital Visit Rate after Outpatient Colonoscopy ................. 1-47
OP-35: Admissions and Emergency Department (ED) Visits for Patients Receiving
Outpatient Chemotherapy .......................................................................................................................... 1-52
OP-36: Hospital Visits after Hospital Outpatient Surgery……………………………………………… 1-57
Section 2: Data Dictionary
Introduction .................................................................................................................................................... 2-1
Interpretation of Data Dictionary Terms ........................................................................................................ 2-1
Data Dictionary Terms ................................................................................................................................... 2-2
General Abstraction Guidelines ..................................................................................................................... 2-3
Alphabetical Data Element List.......................................................................................................................2-7
Alphabetical Data Dictionary ......................................................................................................................... 2-8
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Section 3: Missing and Invalid Data
Introduction .................................................................................................................................................... 3-1
Data Collection and the Unable to be Determined (UTD) Allowable Value ................................................. 3-1
Missing and Invalid Data................................................................................................................................ 3-1
Abstraction Software Skip Logic and Missing Data ...................................................................................... 3-2
Section 4: Population and Sampling Specifications
Introduction .................................................................................................................................................... 4-1
Order of Data Flow ......................................................................................................................................... 4-2
Sample Size Requirements ............................................................................................................................. 4-3
Sampling Approaches ..................................................................................................................................... 4-7
Transmission of Outpatient Population and Sample Data Elements .............................................................. 4-8
Section 5: Hospital Outpatient Quality Measure Data Transmission
Introduction......................................................................................................................................................5-1
Guidelines for Submission of Data..................................................................................................................5-1
Transmission Data Element List......................................................................................................................5-9
Transmission Data Elements..........................................................................................................................5-10
Transmission Data Processing Flow..............................................................................................................5-18
Section 6: Alphabetical Tools and Resources
Hospital OQR Program Arrival Time: Guidelines...........................................................................................6-1
Hospital OQR ED Departure Time: Guidelines...............................................................................................6-2
Template for Collecting OP-29 Data................................................................................................................6-4
OP-29 Algorithm..............................................................................................................................................6-5
OP-29: Appropriate Follow-Up Interval for Normal Colonoscopy in Average Risk Patients.........................6-6
OP-29 Fact Sheet...............................................................................................................................................6-7
Appendices
Appendix A: ICD-10-CM Diagnosis and CPT® Code Table……………………………………………. ...A-1
Appendix B: Glossary of Terms....................................................................................................................B-1
Appendix C: Medication Table.....................................................................................................................C-1
Appendix D: Preview Section.......................................................................................................................D-1

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Acknowledgement
The Hospital Outpatient Quality Reporting Specifications Manual was developed by the Centers for
Medicare & Medicaid Services (CMS) to provide a uniform set of quality measures to be implemented in
hospital outpatient settings. The primary purpose of these measures is to promote high quality care for
patients receiving services in hospital outpatient settings.
No royalty or user fee is required for copying or reprinting this manual, but there are conditions required
for use: 1) The copier or printer must disclose that the Hospital Outpatient Quality Reporting Specifications
Manual is periodically updated, and the copied or reprinted version may not be current, unless the copier or
printer has verified and affirmed the version is current. 2) The copier or printer must disclose that users
participating in the Hospital Outpatient Quality Reporting (OQR) Program are required to update
their software and associated documentation based on the published Hospital Outpatient Quality Reporting
Specifications Manual production timelines.
Example Acknowledgement: The Hospital Outpatient Quality Reporting Specifications Manual [Version xx,
Month, Year] is periodically updated by the Centers for Medicare & Medicaid Services. Users of the
Hospital Outpatient Quality Reporting Specifications Manual must update their software and associated
documentation based on the published manual production timelines.
CPT® only copyright 2023 American Medical Association. All rights reserved.
CPT® is a registered trademark of the American Medical Association.
Applicable FARS\DFARS Restrictions Apply to Government Use.
Fee schedules, relative value units, conversion factors and/or related components are not assigned by the
American Medical Association (AMA), are not part of CPT®, and the AMA is not recommending their use.
The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes
no liability for data contained or not contained herein.
The International Classification of Diseases, 11th Revision, Clinical Modification (ICD-10-CM) is published
by the United States Government. A CD-ROM, which may be purchased through the Government Printing
Office, is the only official Federal government version of the ICD-10-CM. ICD-10-CM is an official Health
Insurance Portability and Accountability Act standard.
IMPORTANT SUBMISSION ALERT!!
To submit Hospital Outpatient Quality Reporting (OQR) Program measures to CMS, files must meet
the specifications found only in this CMS manual. Otherwise, the files will be rejected for not meeting
CMS quality data submission requirements and providers may not receive the full payment update.
Providers who are planning to also submit hospital outpatient measure data to The Joint Commission
must refer to the transmission information separately issued by The Joint Commission. CMS can only
accept files which meet the CMS transmission manual specifications, and such files cannot contain The
Joint Commission additional transmission data elements (e.g., vendor tracking ID, measure category
assignment, measurement value).
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i

Program Background
CMS Quality Initiatives
Background
In November 2001, U.S. Department of Health & Human Services (HHS) Secretary Tommy G. Thompson
announced The Quality Initiative, his commitment to assure quality healthcare for all Americans through
published consumer information coupled with healthcare quality improvement support through Medicare’s
Quality Improvement Organizations (QIOs). The Quality Initiative was launched nationally in 2002 as the
Nursing Home Quality Initiative (NHQI) and expanded in 2003 with the Home Health Quality Initiative
(HHQI) and the Hospital Quality Initiative (HQI). These initiatives are part of a comprehensive look at the
quality of care provided in hospitals, nursing homes, home health agencies, and physician offices. These
efforts grew under subsequent Secretaries through support and expansion of activities that strengthen
healthcare transparency and value-driven healthcare.
The Medicare Improvements and Extension Act under Division B of Title I of the Tax Relief and Health
Care Act (MIEA-TRHCA) of 2006 (Pub. L. 109–432), enacted on December 20, 2006, made changes in the
Outpatient Prospective Payment System (OPPS). The Centers for Medicare & Medicaid Services (CMS) is
now statutorily required to have a program under which hospitals will report data on the quality of hospital
outpatient care using standardized measures to receive the full annual update to the Outpatient Prospective
Payment System (OPPS) payment rate, effective for payment beginning in calendar year (CY) 2009. The
OPPS Final Rule (42 CFR Parts 410, 411, 412, 413, 416, 419, and 489) is accessible at http://www.ecfr.gov.
The program established under the OPPS final rule and supported by this manual is the Hospital Outpatient
Quality Reporting (OQR) Program, formally known as the Hospital Outpatient Quality Data Reporting
Program (HOP QDRP). The measures described in this manual will expand as additional priority areas for
quality improvement in hospital outpatient settings are identified and will be designed to evaluate the
diversity of services and clinical topics provided to adult patients in hospital outpatient settings.
Objective
The Hospital OQR Program uses a variety of tools to stimulate and support a significant improvement in the
quality of hospital outpatient care. This initiative aims to refine and standardize hospital outpatient data
collection, data transmission, and performance measures to construct one robust, prioritized, and standard
quality outpatient measure set for hospitals. The goal is for all private and public purchasers, oversight and
accrediting entities, and payers and providers of hospital outpatient care to use these same measures in their
national public reporting activities. Quality improvement support, collaborations, standardization, and
assuring compliance with Medicare Conditions of Participation (CoPs) are important additional tools in
achieving this objective.
Related National Activities
[

Measure Development

]

Sections 1833(i)(7)(B) and 1833(t)(17)(C)(i) of the Act, requires the Secretary to develop measures
appropriate for the measurement of the quality of care furnished by hospitals in outpatient settings, and that
measures reflect consensus among affected parties. Measures are not required to be endorsed by any national
consensus-based entity. Consensus among affected parties can be achieved in other ways, including the
consensus-based entity’s measure review process, measure development process, through broad acceptance
and use of the measure(s), and through public comment.
[

]

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[

Electronic Clinical Quality Measures (eCQM)

]

Beginning with Calendar Year (CY) 2023 reporting period, hospitals were provided the opportunity to
voluntarily submit data for OP-40: ST-elevation myocardial infarction (STEMI), an electronic clinical
quality measure (eCQM), in the OQR program. eCQMs were developed specifically to allow an electronic
health record (EHR) system, certified to the Office of the National Coordinator (ONC) standards, to capture,
export, calculate, and report measure data.
[

]

Beginning with CY 2024 reporting period, hospitals will be required to report one self-selected calendar
quarter of data. For CY 2025 reporting period the requirement increases to two self-selected calendar
quarters of data, followed by three required quarters in CY 2026 and all four quarters beginning with CY
2027 reporting period. For more information on the adoption of OP-40 eCQM, please refer to the CY 2022
OPPS/ASC Final Rule, beginning on page 63837, published in the Federal Register.
[

]

Refer to the Technical Specifications and Resources for the CMS Quality Reporting Document Architecture
(QRDA) Category I Implementation Guide for the applicable reporting period, measure specification
information, and program resources to support successful eCQM reporting on the eCQI Resource Center.
[

]

Outpatient and Ambulatory Surgery Consumer Assessment (OAS CAHPS)
The OAS CAHPS initiative was developed as a patient-experience-of-care survey for patients who had
surgery or a procedure at a hospital outpatient department (HOPD) or an ambulatory surgery center (ASC).
Prior to OAS CAHPS, there was no standardized survey instrument to assess patient experience with
outpatient surgical care received at HOPDs and ASCs. Hospitals contract with a CMS-approved OAS
CAHPS Survey vendor to conduct the survey. A list of approved survey vendors is available at the following
link: https://oascahps.org/General-Information/Approved-Survey-Vendors.
Beginning with CY 2023 reporting period, hospitals were provided the opportunity to voluntarily submit data
for the OAS CAHPS survey.
Beginning with CY 2024 reporting period, hospitals will be required to report quarterly data by the
submission deadlines provided on the OAS CAHPS website. Data deadlines are also available in Hospital
Outpatient Quality Reporting tab on QualityNet.cms.gov.
Hospital Inpatient Quality Reporting (IQR) Program
The Hospital IQR Program is intended to equip consumers with quality-of-care information to make more
informed decisions about healthcare options. It is also intended to encourage hospitals and clinicians to
improve the quality of inpatient care provided to all patients. The hospital quality of care information
gathered through the program is available to consumers on the public reporting website.
The Hospital IQR Program requires submission of data for specific quality measures for health conditions
common among people with Medicare, which typically results in hospitalization.
Measures Management System
The Measures Management System (MMS) is a set of processes and decision criteria used by CMS to
oversee the development, implementation, and maintenance of healthcare quality measures. CMS recognizes
the need for quality measures of the highest caliber, maintained throughout their life cycle to ensure they
retain the highest level of scientific soundness, importance, feasibility, and usability. Using a standardized
process with broadly recognized criteria, the MMS ensures that CMS will have a coherent, transparent
system for measuring the quality of care delivered to its beneficiaries.
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Paperwork Reduction Act (PRA)
PRA Disclosure Statement
According to the Paperwork Reduction Act of 1995, no persons are required to respond to a collection
of information unless it displays a valid Office of Management and Business (OMB) control number. The
valid OMB control number for this information collection is 0938-1109. The time required to complete this
information collection is estimated to average 15 minutes per response, including the time to review
instructions, search existing data resources, gather the data needed, and complete and review the information
collection. If you have comments concerning the accuracy of the time estimate(s) or suggestions for
improving this form, please write to: CMS, 7500 Security Boulevard, Attn: PRA Reports Clearance Officer,
Mail Stop C4-26-05, Baltimore, MD 21244-1650.
Expiration Date: 02-28-2025

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Using the Manual
This portion of the manual provides a brief overview of the information contained within each section.
It is intended as a quick reference to assist in the implementation of the hospital outpatient measures.
The sections of this manual are interrelated and are most useful when considered together.
Section 1 − Measurement Information
This section contains a Measure Information Form (MIF) for each hospital outpatient measure.
MIFs describe the purpose, use, and clinical rationale for specific measures. They also identify populations
assessed and improvements demonstrated by the measure.
Detailed analytical algorithms are included with each MIF. The algorithms are used to calculate performance
measurement rates for each of the measures. Each algorithm contains detailed steps regarding information
used in the rate calculation. They specify the ways exclusion and inclusion criteria are applied for the
specified measure.
Section 2 − Data Dictionary
This section describes the patient-level data elements required to capture and calculate individual
measurements; it specifies data elements that must be collected for each patient who falls into a selected
population and data elements needed for a specific measure.
Section 3 − Missing and Invalid Data
This section addresses the steps to approach missing and invalid data. Missing data refer to data elements,
required for calculating a hospital outpatient measure, that have no values present for one or more
encounters. Invalid data refer to data element values, required for calculating a hospital outpatient measure,
that fall outside of the range of allowable values defined for that data element. Reducing missing and invalid
data minimizes the bias to a measure rate because records with missing or invalid data cannot be included
in the calculation of the observed measure rate. This section describes preventing missing and invalid data
in detail.
Section 4 − Population and Sampling Specifications
This section provides guidance on defining the hospital’s outpatient population and the order of data flow.
Defining the population is the first step to estimate a hospital’s performance. A population is defined as a
collection of patients sharing a common set of universally measured characteristics, such as an International
Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) Principal Diagnosis or
Current Procedural Terminology (CPT®) Codes. The outpatient population and diagnosis/CPT® codes meet
this description for the hospital outpatient measures. Additional information regarding population and
sampling are found in this section.
Section 5 − Hospital Outpatient Department Quality Measure Data Transmission
This section provides guidelines for transmitting hospital outpatient measure data. It highlights the unique
data transmission specifications for hospital outpatient measure data for the CMS Clinical Data Warehouse.
It is divided into three parts: Guidelines for Submission of Data, Transmission Data Element List, and
Transmission Data Processing Flow. This section provides specific information regarding data transmission.

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Section 6 − Tools and Resources
This section provides additional resources for abstracting measures and data elements.
Appendix A − ICD-10-CM Diagnosis and CPT® Code Tables
For many of the measures, eligibility for inclusion or exclusion in the outpatient population of interest is
defined by the presence of certain ICD-10-CM diagnosis codes and CPT® codes, including Evaluation and
Management (E/M) codes within the patient-level record. Appendix A contains the code tables that define
the populations for all measures. There is a description of the codes, as defined in the applicable coding
manual, and a shortened description that may be used in a data abstraction tool. The Measure Information
section also refers to the codes or tables provided in this section. The code tables in this Appendix are
evaluated periodically and modified as indicated.
Appendix B − Glossary of Terms
Appendix C − Medication Tables
Several of the hospital outpatient measures address the use and timing of certain medications. This appendix
contains tables with the specific names that may be associated with medication categories (e.g., trade names).
These tables are provided to facilitate appropriate data collection of applicable medications. These tables are
not meant to be an inclusive list of all available therapeutic agents; rather, they represent current information
available at the time of publication.
Appendix D − Preview Section
The preview section is intended to provide an overview of future updates. The information provided in a
Preview Section should not be programmed or submitted. Placement in this appendix does not assume that
the information will be implemented in a future manual.

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Outpatient Delivery Settings

Measures

Measure

ED-Throughput
Median Time from ED Arrival to ED Departure for Discharged ED Patients
Left Without Being Seen

OP-18
OP-22

Stroke
Head CT or MRI Scan Results for Acute Ischemic Stroke or Hemorrhagic
Stroke Patients Who Received Head CT or MRI Scan Interpretation Within
45 Minutes of ED Arrival

OP-23

Imaging Efficiency
MRI Lumbar Spine for Low Back Pain
Abdomen CT – Use of Contrast Material
Cardiac Imaging for Preoperative Risk Assessment for Non-Cardiac
Low-Risk Surgery
Breast Cancer Screening Recall Rates

OP-8
OP-10
Measures

OP-13
OP-39

Measures Submitted via a Web-Based Tool
Appropriate Follow-up Interval for Normal Colonoscopy in Average
Risk Patients
Cataracts – Improvement in Patient’s Visual Function within 90 Days Following
Cataract Surgery
COVID-19 Vaccination Coverage Among Health Care Personnel

OP-29
Measures

OP-31
OP-38

Outcome
Facility 7-Day Risk-Standardized Hospital Visit Rate after
Outpatient Colonoscopy
Admissions and Emergency Department (ED) Visits for Patients Receiving
Outpatient Chemotherapy
Hospital Visits after Hospital Outpatient Surgery

OP-32
Measures

OP-35
OP-36

[

[

Measure

]

[

OP-37

]

[

OAS CAHPS

Outpatient and Ambulatory Surgery Consumer Assessment (OAS CAHPS)

[

[

Measure

]

[

OP-40

]

[

]

]

eCQM

]

ST-elevation myocardial infarction (STEMI)

]

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Measure Information Forms
Overview
An algorithm provides the logical steps, data element evaluation, arithmetic calculations, and data
manipulation steps that are required to calculate a given measure. The algorithms and data elements needed
to calculate each of the measures are identified in the Measure Information Form (MIF). Below is a defined
overview of the MIF and Flowchart (Algorithm) formats.
Measure Set – The specific national Hospital Outpatient quality measure set to which an individual measure
belongs (e.g., Acute Myocardial Infarction, ED-Throughput).
Set Measure ID # – A unique alphanumeric identifier assigned to a measure. Information associated with a
measure is identified by this unique alphanumeric number.
Performance Measure Name – A brief title that uniquely identifies the measure.
Description – A brief explanation of the measure’s focus, such as the activity or the area on which
the measure centers attention (e.g., median time from ED arrival to ED departure time for discharged
ED patients).
Rationale – The reason for performing a specified process to improve the quality-of-care outcome. This may
include specific literature references, evidence-based information, expert consensus, etc.
Type of Measure – Indicates what is being evaluated by the measure.
• Process: A measure used to assess a goal-directed, interrelated series of actions, events, mechanisms,
or steps, such as a measure of performance that describes what is done to, for, or by patients, as in
performance of a procedure.
• Outcome: A measure that indicates the result of performance (or non-performance) of a function(s)
or process(es).
•

Measures Submitted via a Web-Based Tool: A measure used to assess a goal-directed, interrelated
series of actions, events, mechanisms, or steps with data entry achieved through the secure side of
QualityNet.org.

Improvement Noted As – Describes how improvement would be indicated by the measure.
• An increase in the rate/score/number of occurrences.
• A decrease in the rate/score/number of occurrences.
• Either an increase or a decrease in the rate/score/number of occurrences, depending upon the context of
the measure (e.g., utilization).
Numerator Statement – Represents the portion of the denominator that satisfies the conditions of the
performance measure.
• Included Population in Numerator: Specific information describing the population(s) comprising the
numerator, not contained in the numerator statement, or not applicable.
• Excluded Population in Numerator: Specific information describing the population(s) that should not
be included in the numerator, or none.
• Data Elements: Those data elements necessary or required to determine (or establish) the numerator.
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Note: If the measure is reported as a rate (proportion or ratio), the Numerator and Denominator Statements
are completed. If a performance measure does not have both a numerator and a denominator, then a
Continuous Variable Statement is completed.
Denominator Statement – Represents the population evaluated by the performance measure.
• Included Population in Denominator: Specific information describing the population(s) comprising the
denominator, not contained in the denominator statement, or not applicable.
• Excluded Population in Denominator: Specific information describing the population(s) that should
not be included in the denominator, or none.
• Data Elements: Those data elements required to determine (or establish) the denominator.
Note: If the measure is reported as a rate (proportion or ratio), the Numerator and Denominator Statements
are completed. If a performance measure does not have both a numerator and a denominator, then a
Continuous Variable Statement is completed.
Continuous Variable Statement – Describes an aggregate data measure in which the value of each
measurement can fall anywhere along a continuous scale.
• Included Population in Continuous Variable: Specific information describing the population(s)
comprising the performance measure, not contained in the Continuous Variable Statement, or
not applicable.
• Excluded Population in Continuous Variable: Specific information describing the population(s) that
should not be included in the performance measure, or none.
• Data Elements: Those data elements required to determine (or establish) the measure for a
continuous variable.
Note: If a measure is reported as a central tendency, the Continuous Variable Statement is completed. This
item is only completed when the performance measure does not have numerator and denominator statements.
Risk Adjustment – Indicates whether a measure is subject to the statistical process for reducing, removing,
or clarifying the influences of confounding factors to allow more useful comparisons.
Data Collection Approach – Recommended timing for when data should be collected for a measure. Data
collection approaches include retrospective, concurrent, prospective, or Medicare Claims data collection.
• Retrospective data collection: Involves collecting data for events that have already occurred.
• Concurrent data collection: The process of gathering data on how a process works or is working while
a patient is in active treatment.
• Prospective data collection: Data collection in anticipation of an event or occurrence.
• Medicare Claims data collection: The use of data that is administratively derived from CMS claims and
does not require abstraction.
Data Accuracy – Recommendations to reduce identifiable data errors, to the extent possible.
Measure Analysis Suggestions – Recommendations to assist in the process of interpreting data and drawing
valid conclusions.
Sampling – Indicates whether a measure can be sampled. Sampling is a process of selecting a
representative part of the population to estimate the hospital’s performance without
collecting data for its entire population.
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Data Reported As – Indicates how data will be reported for a measure.
• Aggregate rate generated from count data reported as a proportion.
• Aggregate rate generated from count data reported as a ratio.
• Aggregate measures of central tendency.
• Claims data reported as condition-specific, hospital-specific, or risk-standardized.
Selected References – Specific literature references that are used to support the importance of the
performance measure.
Algorithm Introduction
Each measure set’s initial patient population and associated measures are described by a unique algorithm. An
algorithm is a predefined set of rules that helps to break down complex processes into simple, repetitive steps.
Initial Patient Population algorithms evaluate and identify which episode of care (EOC) records are in the
measure set’s population and are eligible to be sampled.
Measure algorithms serve two purposes. First, they evaluate and identify which EOC records contain missing
and/or invalid data that will prohibit the ability to properly evaluate the measure. Second, they determine if:
• For rate-based measures, the patient’s EOC record belongs in the measure population described by the
denominator and if the patient experienced the event described in the numerator.
• For continuous variable measures, the patient’s EOC record belongs in the patient population described
in the measure’s statement and, if so, to define and calculate the measurement value.
This section contains some standard flowcharting conventions used to develop each algorithm:
• Flow lines: Used to guide the reader to different parts of the algorithm, with arrows denoting the
direction of movement. Generally, movement is from the top to the bottom of the chart.
• Symbols: Used in each algorithm are described later in this section under Flowchart Symbols.
• Temporary variables: Within algorithms are noted in the variable key at the top of each page.

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Flowchart Symbols
Start/Stop (ovals) denotes the beginning or end of an algorithm.
Diamonds represent “If…Then” decision points for logic tests and comparisons. Two
or three flow lines exit the decision point to reflect alternative actions based upon an
evaluation of the condition(s) stated around the decision point.
Rectangles or process boxes show when computation or manipulation of the data are
required, such as a calculation or summarization.
Circle or “On-page” connectors, labeled with a letter, show a link to sections of the
algorithm which are continued on the same page.
Five-sided or “Off-page” connectors, labeled with a letter, show a link to sections of
the algorithm which are continued on different pages.
Note: Both circular, “On-page,” and five-sided, “Off-page,” connectors containing the
letters B, D, E, X, or Y lead to measure Outcome Boxes.
Outcome Boxes represent the result of data passed through the algorithm. Connectors
extending from outcome boxes lead to the end of the algorithm or to risk adjustment
procedures, where applicable. This symbol is also used to identify the strata within a
stratified measure.
Symbol to represent comments (“note”) that should be considered when programming
the flowchart.
The open rectangle symbol is placed alongside the Process box to which they are
applicable. Comments are used to expand upon information contained within the
process box, such as how to properly calculate age. Comments are never the sole
location where processing logic is provided.
Start/Return symbols denote the beginning and end of a sub-routine. Algorithms that
use this symbol are called from another algorithm, and the data processing flow
returns to the calling algorithm when the “Return” is encountered.
See the Initial Patient Population Algorithms and Transmission Data Processing Flows
for an example of the usage of this symbol.
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Measure Category Assignments
Measure Category Assignments are calculated measure results for each EOC that is processed through a
measure algorithm.
The following are the possible Measure Category Assignments:
B

Not in Measure Population
• For rate-based and continuous variable measures: Record is not a member of the measure’s
population.

D

In Measure Population (used for reporting)
• For rate-based measures: Record is a member of the measure’s population, and there has not
been an occurrence of the measure.
• For continuous variable measures: Record is a member of the measure’s population and has
sufficient, accurate, and valid data to compute the measurement.

D(#)

In Measure Population (used to identify stratified populations of specific measures)
• For rate-based measures: Record is a member of the measure’s population, and there has not
been an occurrence of the measure.
• For continuous variable measures: Record is a member of the measure’s population and has
sufficient, accurate, and valid data to compute the measurement.

E

In Numerator Population
• For rate-based measures: Record is a member of the measure’s population, and there has been an
occurrence of the measure.
• For continuous variable measures: Does not apply.

X

Data Are Missing
• For rate-based and continuous variable measures: Data are missing that are required to calculate
the measure. The record will be rejected when transmitted.

Y1

Unable to Determine (UTD) (Allowable Value Does Not Allow Calculation of the Measure)
• For rate-based measures: Does not apply.
• For continuous variable measures: Record contains a Date, Time, or Numeric data element with
a value of ‘UTD.’

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Hospital Outpatient Quality Measures
ED-Throughput
Set Measure ID # Measure Short Name
OP-18
Median Time from ED Arrival to ED Departure for Discharged ED Patients
OP-22
Left Without Being Seen*
*Data entry for OP-22 will be achieved through the Hospital Quality Reporting (HQR) system via an online
tool available to authorized users. Because the measure uses administrative data and not claims data to
determine the measure’s denominator population, OP-22 is not included in the ED-Throughput Population.
OP ED-Throughput General Data Element List
General Data Element Name
Collected for:
Arrival Time
All Records
Birthdate
All Records
CMS Certification Number ǂ, ‡
All Records
First Name
All Records
Hispanic Ethnicity
All Records
Last Name
All Records
National Provider Identifier ǂ, ‡
Optional for All Records
Outpatient Encounter Date
All Records
Patient Identifier
All Records
Payment Source
All Records
Physician 1
Optional for All Records
Physician 2
Optional for All Records
Postal Code
All Records
Race
All Records
Sex
All Records
ǂ Transmission Data Element
‡ Defined in the Transmission Data Element List within the Hospital Outpatient Measure Data Transmission
section of this manual.
OP ED-Throughput Specific Data Element List
OP ED Data Element Name
Collected for:
Arrival Time
OP-18
Discharge Code
OP-18
E/M Code
OP-18
ED Departure Date
OP-18
ED Departure Time
OP-18
ICD-10-CM Principal Diagnosis Code
OP-18
Outpatient Encounter Date
OP-18

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OP-18 Hospital Outpatient Emergency Department Throughput Population
ED-Throughput
The population of the OP-18 measure is identified using 1 data element:
• E/M Code
Patients seen in a Hospital Emergency Department (E/M Code in Appendix A OP Table 1.0) are included in
the OP-18 Hospital Outpatient Population and are eligible to be sampled if they have an E/M Code in
Appendix A, OP Table 1.0.

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Algorithm Narrative for OP-18:
ED-Throughput Hospital Outpatient Population
Variable Key: OP Population Reject Case Flag
1. Start ED-Throughput Initial Patient Population logic sub-routine. Process all cases that have successfully
reached the point in the Transmission Data Processing Flow: Clinical which calls this Initial Patient
Population Algorithm. Do not process cases that have been rejected before this point in the Transmission
Data Processing Flow.
2. Check E/M Code
a. If the E/M Code is not on OP Table 1.0 (Appendix A), the patient is not in the ED Initial Patient
Population and is not eligible to be sampled for the ED-Throughput measure set. Set the Initial
Patient Population Reject Case Flag to equal Yes. Return to Transmission Data Processing Flow in
the Data Transmission section.
b. If the E/M Code is on OP Table 1.0 (Appendix A), the patient is in the ED Initial Patient Population
and is eligible to be sampled for the ED-Throughput measure set. Set Initial Patient Population Reject
Case Flag to equal No. Return to Transmission Data Processing Flow in the Data Transmission section.

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NQF-Endorsed Voluntary Consensus Standards for Hospital Care
Measure Information Form
Performance Measure Name: Median Time from ED Arrival to ED Departure for Discharged ED Patients
Measure ID #: OP-18
Measure Set: Hospital Outpatient ED-Throughput
Outpatient Setting: Emergency Department
Set Measure ID #
OP-18a
OP-18b
OP-18c
OP-18d

Performance Measure Name
Median Time from ED Arrival to ED Departure for Discharged ED Patients –
Overall Rate
Median Time from ED Arrival to ED Departure for Discharged ED Patients –
Reporting Measure
Median Time from ED Arrival to ED Departure for Discharged ED Patients –
Psychiatric/Mental Health Patients
Median Time from ED Arrival to ED Departure for Discharged ED Patients –
Transfer Patients

Description: Median time from emergency department arrival to time of departure from the emergency
room for patients discharged from the emergency department.
Rationale: Empirical evidence demonstrates that emergency department (ED) throughput is an indicator of
hospital quality of care and shows that shorter lengths of stay in the ED lead to improved clinical outcomes.
Significant ED overcrowding has numerous downstream effects, including prolonged patient waiting times,
increased suffering for those who wait, rushed and unpleasant treatment environments, and potentially poor
patient outcomes (Gardner, 2018). Quality improvement efforts aimed at reducing ED overcrowding and
length of stay have been associated with an increase in ED patient volume, decrease in number of patients
who leave without being seen, reduction in costs, and increase in patient satisfaction (Bucci, 2016; Chang,
2017; Zocchi, 2015).
Recent peer-reviewed studies also demonstrate the need for dedicated emergency mental health services,
supplying evidence that the clinical needs for these patients substantively differ from the non-psychiatric
population (ACEP, 2017; Lester, 2018).
Type of Measure: Process
Improvement Noted As: A decrease in the median value.
Continuous Variable Statement: Time (in minutes) from ED arrival to ED departure for patients
discharged from the emergency department.

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Included Populations:
• Any ED patient from the facility’s emergency department
Excluded Populations:
• Patients who expired in the emergency department
Data Elements:
• Arrival Time
• Discharge Code
• E/M Code
• ED Departure Date
• ED Departure Time
• ICD-10-CM Principal Diagnosis Code
• Outpatient Encounter Date

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Risk Adjustment: No
Data Collection Approach: Retrospective data sources for required data elements include administrative
data and medical record documents. Some hospitals may prefer to gather data concurrently by identifying
patients in the population of interest. This approach provides opportunities for improvement at the point of
care/service. However, complete documentation includes the principal or other ICD-10-CM diagnosis and
procedure codes, which require retrospective data entry.
Data Accuracy: There may be variation by provider, facility, and documentation protocol for chartabstracted data elements.
Measure Analysis Suggestions: None
Sampling: Yes; for additional information see the Population and Sampling Specifications section.
Data Reported As: Aggregate measure of central tendency.
Selected References:
• Bucci, S., A. G. de Belvis, S. Marventano, A. C. De Leva, M. Tanzariello, M. L. Specchia, W. Ricciardi
and F. Franceschi. Emergency department crowding and hospital bed shortage: Is Lean a smart answer?
A systematic review. Eur Rev Med Pharmacol Sci, 2016, 20(20), 4209-4219.
• Chang, A. M., A. Lin, R. Fu, K. J. McConnell and B. Sun. Associations of Emergency Department
Length of Stay With Publicly Reported Quality-of-care Measures. Acad Emerg Med, 2017, 24(2),
246-250.
• Gardner, R. M., N. A. Friedman, M. Carlson, T. S. Bradham and T. W. Barrett. Impact of revised triage
to improve throughput in an ED with limited traditional fast track population. Am J Emerg Med., 2017,
36(1), 124-127.
• Lester, N. A., L. R. Thompson, K. Herget, J. A. Stephens, J. V. Campo, E. J. Adkins, T. E. Terndrup and
S. Moffatt-Bruce. CALM Interventions: Behavioral Health Crisis Assessment, Linkage, and
Management Improve Patient Care. Am J Med Qual., 2017, 33(1), 65-71.
• Zocchi, M. S., M. S. McClelland, and J. M. Pines. Increasing Throughput: Results From A 42-Hospital
Collaborative To Improve Emergency Department Flow. The Joint Commission Journal on Quality and
Patient Safety, 2015, 41(12):532–542.

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Algorithm Narrative for OP-18:
Median Time from ED Arrival to ED Departure for Discharged ED Patients
Continuous Variable Statement: Time (in minutes) from ED arrival to ED departure for patients
discharged from the emergency department.
1. Start processing. Run all cases that are included in the ED-Throughput Hospital Outpatient Population
Algorithm and pass the edits defined in the Data Processing Flow through this measure. Proceed to ICD10-CM Principal Diagnosis Code.
2. Check Discharge Code
a. If Discharge Code is missing, the case will proceed to a Measure Category Assignment of X and will
be rejected. Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
b. If Discharge Code equals 6, 7, or 8, the case will proceed to a Measure Category Assignment of B.
Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
c. If Discharge Code equals 1, 2, 3, 4a, 4b, 4c, 4d, or 5, the case will proceed to Arrival Time.
3. Check Arrival Time
a. If Arrival Time equals UTD, the case will proceed to a Measure Category Assignment of Y. Return to
Transmission Data Processing Flow: Clinical in the Data Transmission section.
b. If Arrival Time equals Non-UTD Value, the case will proceed to ED Departure Date.
4. Check ED Departure Date
a. If ED Departure Date is missing, the case will proceed to a Measure Category Assignment
of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If ED Departure Date equals UTD, the case will proceed to a Measure Category Assignment of Y.
Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
c. If ED Departure Date equals non-UTD, the case will proceed to ED Departure Time.
5. Check ED Departure Time
a. If ED Departure Time is missing, the case will proceed to a Measure Category Assignment
of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If ED Departure Time equals UTD, the case will proceed to a Measure Category Assignment of Y.
Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
c. If ED Departure Time equals non-UTD, the case will proceed to Measurement Value.
6. Calculate the Measurement Value
a. Time in minutes is equal to the ED Departure Date and ED Departure Time (in minutes) minus the
Outpatient Encounter Date and Arrival Time (in minutes).
7. Check Measurement Value
a. If Measurement Value is less than 0 minutes, the case will proceed to a Measure Category
Assignment of X and will be rejected. Return to Transmission Data Processing Flow: Clinical
in the Data Transmission section.
b. If Measurement Value is greater than or equal to 0 minutes, the case will proceed to a Measure
Category Assignment of D1.

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8. Initialize the Measure Category Assignment for all cases in D1
9. Proceed to ICD-10-CM Principal Diagnosis Code
10. Check ICD-10-CM Principal Diagnosis Code
a. If ICD-10-CM Principal Diagnosis Code is in Appendix A, OP Table 7.01, the case will proceed to a
Measure Category Assignment of D2. Proceed to Discharge Code.
b. If ICD-10-CM Principal Diagnosis Code is not in Appendix A, OP Table 7.01, the case will proceed
to Discharge Code.
11. Check Discharge Code
a. If Discharge Code equals 4a or 4d, the case will proceed to a Measure Category Assignment of D3.
Proceed to ICD-10-CM Principal Diagnosis Code.
b. If Discharge Code equals 1, 2, 3, 4b, 4c, or 5, the case will proceed to ICD-10-CM Principal
Diagnosis Code.
12. Check ICD-10-CM Principal Diagnosis Code
a. If ICD-10-CM Principal Diagnosis Code is in Appendix A, OP Table 7.01, the case will proceed to a
Measure Category Assignment of B. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
b. If ICD-10-CM Principal Diagnosis Code is not in Appendix A, OP Table 7.01, the case will proceed
to Discharge Code.
13. Check Discharge Code
a. If Discharge Code equals 4a or 4d, the case will proceed to a Measure Category Assignment of B.
Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
b. If Discharge Code equals 1, 2, 3, 4b, 4c, or 5, the case will proceed to a Measure Category
Assignment of D. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.

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Measure Information Form
Performance Measure Name: Left Without Being Seen
Measure ID #: OP-22
Measure Set: Hospital Outpatient ED-Throughput
Outpatient Setting: Emergency Department
Description: Percent of patients who leave the Emergency Department (ED) without being evaluated by a
physician/advanced practice nurse/physician’s assistant (physician/APN/PA).
Measure ascertains response to the following question(s):
• What was the total number of patients who left without being evaluated by a physician/APN/PA?
__________(numerator).
• What was the total number of patients who presented to the ED? _________(denominator).
Annual data submission period: See the timeline posted to QualityNet.CMS.gov for this measure; select
Hospitals-Outpatient and then Participation tab. Data will be completed through the Hospital Quality
Reporting (HQR) system at https://hqr.cms.gov via an online tool available to authorized users.
Definition for patients who presented to the ED:
• Patients who presented to the ED are those that signed in to be evaluated for emergency services.
Definition for Physician/APN/PA:
• Patients who are seen by a resident or intern are to be considered as seen by a physician.
• An institutionally credentialed provider, acting under the direct supervision of a physician for healthcare
services in the emergency department (e.g., an obstetric nurse providing assessment of an obstetric
patient) are to be considered as seen by a physician.
• Advanced Practice Nurse (APN, APRN) titles may vary between state and clinical specialties. Some
common titles that represent the advanced practice nurse role are:
▪ Nurse Practitioner (NP)
▪ Certified Registered Nurse Anesthetist (CRNA)
▪ Clinical Nurse Specialist (CNS)
▪ Certified Nurse Midwife (CNM)

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Hospital Outpatient Quality Measure
Stroke
Measure ID #
OP-23

Measure Short Name
Head CT or MRI Scan Results for Acute Ischemic Stroke or Hemorrhagic Stroke
Patients Who Received Head CT or MRI Scan Interpretation Within 45 minutes
of ED Arrival

OP Stroke General Data Element List
General Data Element Name
Collected For:
Arrival Time
All Records
Birthdate
All Records
CMS Certification Number ‡, †
All Records
First Name
All Records
Hispanic Ethnicity
All Records
Last Name
All Records
National Provider Identifier ‡, †
Optional for All Records
Outpatient Encounter Date
All Records
Patient Identifier
All Records
Payment Source
All Records
Physician 1
Optional for All Records
Physician 2
Optional for All Records
Postal Code
All Records
Race
All Records
Sex
All Records
‡
Transmission Data Element
†
Defined in the Transmission Data Element List within the Hospital Outpatient Measure Data Transmission
section of this manual.
OP Stroke Specific Data Element List
OP Stroke Data Element Name
Collected For:
Arrival Time
OP-23
Discharge Code
OP-23
E/M Code
OP-23
Date Last Known Well
OP-23
ICD-10-CM Principal Diagnosis Code
OP-23
Head CT Scan or MRI Order
OP-23
Head CT Scan or MRI Interpretation Date
OP-23
Head CT Scan or MRI Interpretation Time
OP-23
Last Known Well
OP-23
Time Last Known Well
OP-23

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OP-23 Hospital Outpatient Emergency Department Stroke Population
Stroke
The population of the OP-23 ED Stroke measure is identified using 4 data elements:
• E/M Code
• Outpatient Encounter Date
• Birthdate
• ICD-10-CM Principal Diagnosis Code
Patients seen in a Hospital Emergency Department (E/M Code in Appendix A, OP Table 1.0) are included in
the OP-23 ED Stroke Hospital Outpatient Population and are eligible to be sampled if they have:
• A patient age on Outpatient Encounter Date (Outpatient Encounter Date – Birthdate) ≥ 18 years, and
• An ICD-10-CM Principal Diagnosis Code for Acute Ischemic or Hemorrhagic Stroke as defined in
Appendix A, OP Table 8.0

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Algorithm Narrative for OP-23:
Stroke Hospital Outpatient Population
1. Start Stroke Initial Patient Population logic sub-routine. Process all cases that have successfully reached
the point in the Transmission Data Processing Flow: Clinical which calls this Initial Patient Population
Algorithm. Do not process cases that have been rejected before this point in the Transmission Data
Processing Flow.
2. Check E/M Code
a. If E/M Code is not in Appendix A, OP Table 1.0, patient is not in the Outpatient Stroke Population.
Patient is not eligible to be sampled for the OP-23 measure. Set the OP Population Reject Case Flag
to Yes. Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
b. If E/M Code is in Appendix A, OP Table 1.0, continue processing and proceed to Measurement Value.
3. Calculate Measurement Value. Measurement Value, in years, is equal to the Outpatient Encounter Date
minus Birthdate
4. Check Measurement Value
a. If the Measurement Value is less than 18 years, patient is not in the Outpatient Stroke Population.
Patient is not eligible to be sampled for the OP-23 measure. Set the OP Population Reject Case Flag
to Yes. Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
b. If the Measurement Value is greater than or equal to 18 years, continue processing, and the case will
proceed to ICD-10-CM Principal Diagnosis Code.
5. Check ICD-10-CM Principal Diagnosis Code
a. If the ICD-10-CM Principal Diagnosis Code is on Table 8.0, patient is in the Outpatient Stroke
Population. Patient is eligible to be sampled for the OP-23 measure. Set the OP Population
Reject Case Flag to No. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If the ICD-10-CM Principal Diagnosis Code is not on Table 8.0, patient is not in the Outpatient
Stroke Population. Patient is not eligible to be sampled for the OP-23 measure. Set the OP Population
Reject Case Flag to Yes. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.

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NQF-Endorsed Voluntary Consensus Standards for Hospital Care
Measure Information Form
Performance Measure Name: Head CT or MRI Scan Results for Acute Ischemic Stroke or Hemorrhagic
Stroke Patients who Received Head CT or MRI Scan Interpretation Within 45 Minutes of ED Arrival
Measure ID #: OP-23
Measure Set: Hospital Outpatient Stroke
Outpatient Setting: Emergency Department
Description: Emergency Department Acute Ischemic Stroke or Hemorrhagic Stroke patients who arrive at
the ED within 2 hours of the onset of symptoms who have a head CT or MRI scan performed during the stay
and having a time from ED arrival to interpretation of the Head CT or MRI scan within 45 minutes of arrival.
Rationale: The Centers for Disease Control and Prevention (CDC) estimates that nearly 800,000 people
experience a stroke in the United States each year; approximately 140,000 deaths annually are related to
stroke (Yang et al., 2017). The American Heart Association (AHA) and American Stroke Association
(ASA) recommend performing emergency imaging of the brain before initiating any specific treatment for
acute stroke; for most patients, a non-enhanced brain imaging scan, such as a computed tomography (CT)
scan or magnetic resonance imaging (MRI), provides sufficient information to make care decisions (Powers
et al., 2018; Jauch et al. 2013). Timely brain imaging is a critical component of ED evaluation for patients
with suspected acute stroke because it provides important information about the diagnosis, prognosis, and
treatment needs for these patients (Powers et al. 2018). AHA/ASA guidelines recommend that brain
imaging be interpreted by a qualified provider within 45 minutes of ED arrival because results from these
studies are critical to differentiate ischemic strokes, hemorrhagic strokes, and stroke mimics; imaging
findings can be used to identify appropriate candidates for tissue plasminogen activator (tPA), which is the
gold standard for treating acute ischemic stroke (Jauch et al. 2013). Because the Food and Drug
Administration (FDA) has approved tPA for use within three hours of symptom onset, prompt imaging can
accelerate administration of the time-sensitive therapy for eligible patients (Cheng et al. 2015).
Because of the therapeutic window for selecting a stroke treatment, timely completion and interpretation of
the CT or MRI scan are imperative; playing a role in evaluating the quality of care a patient receives
(Kamal, 2017). Decreasing radiology report turnaround times can improve care team coordination, impact
ED length of stay, and reduce the time needed for providers to initiate potentially life-saving interventions
for stroke patients (Handel, 2011).
Type of Measure: Process
Improvement Noted As: An increase in the rate.
Numerator Statement: Emergency Department Acute Ischemic Stroke or Hemorrhagic Stroke patients
arriving at the ED within 2 hours of the Time Last Known Well, with an order for a head CT or MRI scan
whose time from ED arrival to interpretation of the Head CT scan is within 45 minutes of arrival.
Included Populations: Not Applicable
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Excluded Populations: None
Data Elements:
• Arrival Time
• Head CT or MRI Scan Interpretation Date
• Head CT or MRI Scan Interpretation Time
• Outpatient Encounter Date
Denominator Statement: Emergency Department Acute Ischemic Stroke or Hemorrhagic Stroke patients
arriving at the ED within 2 hours of the Time Last Known Well with an order for a head CT or MRI scan.
Included Populations:
• Patients with an ICD-10-CM Principal Diagnosis Code for acute ischemic stroke, or hemorrhagic stroke
as defined in Appendix A, OP Table 8.0; and
• Patients who had a Head CT or MRI Scan Order; and
• An E/M Code for emergency department encounter as defined in Appendix A, OP Table 1.0.
Excluded Populations:
• Patients less than 18 years of age.
• Patients who expired.
• Patients who left the emergency department against medical advice, discontinued care, or for whom
Discharge Code is not documented or unable to be determined (UTD).
Data Elements:
• Birthdate
• Date Last Known Well
• Discharge Code
• E/M Code

•
•
•
•

Head CT or MRI Scan Order
ICD-10-CM Principal Diagnosis Code
Last Known Well
Time Last Known Well

Risk Adjustment: No
Data Collection Approach: Retrospective data sources for required data elements include administrative
data and medical record documents. Some hospitals may prefer to gather data concurrently by identifying
patients in the population of interest. This approach provides opportunities for improvement at the point of
care/service. However, complete documentation includes the principal or other ICD-10-CM diagnosis and
procedure codes, which require retrospective data entry.
Data Accuracy: Variation may exist in the assignment of ICD-10-CM codes; therefore, coding practices
may require evaluation to ensure consistency. There may be additional variation by provider, facility, and
documentation protocol for chart-abstracted data elements.
Measure Analysis Suggestions: None
Sampling: Yes; for additional information see the Population and Sampling Specifications section.
Data Reported As: Aggregate rate generated from count data reported as a proportion.

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Suggested References:
• Cheng NT, Kim AS. Intravenous Thrombolysis for Acute Ischemic Stroke Within 3 Hours Versus Between
3 and 4.5 Hours of Symptom Onset. Demaerschalk BM, ed. The Neurohospitalist, 2015;5(3):101-109.
• Jauch E.C., Saver J.L., Adams H.P. Jr, Bruno A., Connors J.J., Demaerschalk B.M., Khatri P., McMullan
PW Jr, Qureshi AI, Rosenfield K, Scott PA, Summers DR, Wang DZ, Wintermark M, Yonas H; on behalf
of the American Heart Association Stroke Council, Council on Cardiovascular Nursing, Council on
Peripheral Vascular Disease, and Council on Clinical Cardiology. (2013). Guidelines for the early
management of patients with acute ischemic stroke: a guideline for healthcare professionals from the
American Heart Association/American Stroke Association. Stroke, 44(3), 870-947
• Handel, D., Epstein, S., Khare, R., Abernethy, D., Klauer, K., Pilgrim, R., Soremekun, O. and O. Sayan.
(2011). Interventions to Improve the Timeliness of Emergency Care. Academic Emergency Medicine,
18:1295-302.
• Kamal, N., S. Sheng, Y. Xian, R. Matsouaka, M. D. Hill, D. L. Bhatt, J. L. Saver, M. J. Reeves, G. C.
Fonarow, L. H. Schwamm and E. E. Smith. (2017). Delays in Door-to-Needle Times and Their Impact on
Treatment Time and Outcomes in Get With The Guidelines-Stroke. Stroke, 48(4), 946-954.
• Powers, W.J., Rabinstein, A.A., Ackerson, T., Adeoye, O. M., et al. (2018). American Heart
Association/American Stroke Association.
• Powers, W. J., C. P. Derdeyn, J. Biller, C. S. Coffey, B. L. Hoh, E. C. Jauch, K. C. Johnston, S. C. Johnston,
A. A. Khalessi, C. S. Kidwell, J. F. Meschia, B. Ovbiagele, and D. R. Yavagal. (2015). American Heart
Association/American Stroke Association Focused Update of the 2013 Guidelines for the Early
Management of Patients with Acute Ischemic Stroke Regarding Endovascular Treatment.

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Algorithm Narrative for OP-23:
Head CT or MRI Scan Results for Acute Ischemic Stroke or Hemorrhagic Stroke Patients who
Received Head CT or MRI Scan Interpretation Within 45 Minutes of ED Arrival
Numerator Statement: Emergency Department Acute Ischemic Stroke or Hemorrhagic Stroke patients who
arrive at the ED within 2 hours of the onset of symptoms who have a head CT or MRI scan performed during
the stay and having a time from ED arrival to interpretation of the Head CT or MRI scan within 45 minutes
of arrival.
Denominator Statement: Emergency Department Acute Ischemic Stroke or Hemorrhagic Stroke patients
arriving at the ED within 2 hours of the Time Last Known Well with an order for a head CT or MRI scan.
1. Start processing. Run cases that are included in the Stroke Hospital Outpatient Population and pass the
edits defined in the Data Processing Flow through this measure.
2. Check Discharge Code.
a. If Discharge Code is missing, the case will proceed to a Measure Category Assignment of X and will
be rejected. Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
b. If Discharge Code equals 6, 7, or 8, the case will proceed to a Measure Category Assignment of B
and will not be in the Measure Population. Return to Transmission Data Processing Flow: Clinical in
the Data Transmission section.
c. If Discharge Code equals 1, 2, 3, 4a, 4b, 4c, 4d, or 5, continue processing and proceed to Head CT or
MRI Scan Order.
3. Check Head CT or MRI Scan Order.
a. If Head CT or MRI Scan Order is missing, the case will proceed to a Measure Category Assignment
of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If Head CT or MRI Scan Order equals No, the case will proceed to a Measure Category Assignment
of B and will not be in the Measure Population. Return to Transmission Data Processing Flow:
Clinical in the Data Transmission section.
c. If Head CT or MRI Scan Order equals Yes, continue processing and proceed to Last Known Well.
4. Check Last Known Well.
a. If Last Known Well is missing, the case will proceed to a Measure Category Assignment of X
and will be rejected. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If Last Known Well equals No, the case will proceed to a Measure Category Assignment of B and
will not be in the Measure Population. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
c. If Last Known Well equals Yes, continue processing and proceed to Date Last Known Well.
5. Check Date Last Known Well.
a. If Date Last Known Well is missing, the case will proceed to a Measure Category Assignment
of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.

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b. If Date Last Known Well equals UTD, the case will proceed to a Measure Category Assignment of D
and will be in the Measure Population. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
c. If Date Last Known Well equals a Non-UTD Value, continue processing and proceed to Time Last
Known Well.
6. Check Time Last Known Well.
a. If Time Last Known Well is missing, the case will proceed to a Measure Category Assignment
of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If Time Last Known Well equals UTD, the case will proceed to a Measure Category Assignment of D
and will be in the Measure Population. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
c. If Time Last Known Well equals a Non-UTD Value, continue processing and proceed to Arrival Time.
7. Check Arrival Time.
a. If Arrival Time equals UTD, the case will proceed to a Measure Category Assignment of D and will
be in the Measure Population. Return to Transmission Data Processing Flow: Clinical in the Data
Transmission section.
b. If Arrival Time equals a Non-UTD Value, continue processing and proceed to Measurement Value.
8. Calculate Measurement Value. Measurement Value, in minutes, is equal to the Outpatient Encounter
Date and Arrival Time minus Date Last Known Well and Time Last Known Well.
9. Check Measurement Value.
a. If the Measurement Value is greater than 120 minutes, the case will proceed to a Measurement
Category Assignment of B and will not be in the Measure Population. Return to Transmission Data
Processing Flow: Clinical in the Data Transmission section.
b. If the Measurement Value is greater than or equal to zero and less than or equal to 120 minutes,
continue processing and proceed to Head CT or MRI Scan Interpretation Date.
c. If the Measurement Value is less than zero minutes, the case will proceed to a Measurement Category
Assignment of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
10. Check Head CT or MRI Scan Interpretation Date.
a. If Head CT or MRI Scan Interpretation Date is missing, the case will proceed to a Measure Category
Assignment of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
b. If Head CT or MRI Scan Interpretation Date equals UTD, the case will proceed to a Measure
Category Assignment of D and will be in the Measure Population. Return to Transmission Data
Processing Flow: Clinical in the Data Transmission section.
c. If Head CT or MRI Scan Interpretation Date equals a Non-UTD Value, continue processing and
proceed to Head CT or MRI Scan Interpretation Time.
11. Check Head CT or MRI Scan Interpretation Time.
a. If Head CT or MRI Scan Interpretation Time is missing, the case will proceed to a Measure Category
Assignment of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.
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b. If Head CT Scan Interpretation Time equals UTD, the case will proceed to a Measure Category
Assignment of D and will be in the Measure Population. Return to Transmission Data Processing
Flow: Clinical in the Data Transmission section.
c. If Head CT Scan Interpretation Time equals a Non-UTD Value, continue processing and proceed to
Measurement Value.
12. Calculate Measurement Value.
a. Measurement Value, in minutes, is equal to the Head CT or MRI Scan Interpretation Date and Head
CT or MRI Scan Interpretation Time minus Outpatient Encounter Date and Arrival Time.
13. Check Measurement Value.
a. If the Measurement Value is greater than 45 minutes, the case will proceed to a Measurement
Category Assignment of D and will be in the Measure Population. Return to Transmission Data
Processing Flow: Clinical in the Data Transmission section.
b. If the Measurement Value is greater than or equal to zero and less than or equal to 45 minutes, the
case will proceed to a Measure Category Assignment of E and will be in the Measure Population.
Return to Transmission Data Processing Flow: Clinical in the Data Transmission section.
c. If the Measurement Value is less than zero minutes, the case will proceed to a Measure Category
Assignment of X and will be rejected. Return to Transmission Data Processing Flow: Clinical in the
Data Transmission section.

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Measure Information Form
Performance Measure Name: Magnetic Resonance Imaging (MRI) Lumbar Spine for Low Back Pain
[

]

Measure ID #: OP-8
Measure Set: Outpatient Imaging Efficiency (OIE) Measures
[

]

[

]

Description: This measure calculates the percentage of magnetic resonance imaging (MRI) studies of the
lumbar spine with a diagnosis of low back pain on the imaging claim for which the Medicare fee-for-service
(FFS) beneficiary did not have claims-based evidence of antecedent conservative therapy prior to undergoing
the index imaging.
[

[

]

]

[

]

[

]

[

Antecedent conservative therapy may include:
1. Claim(s) for physical therapy in the 60 days preceding the lumbar spine MRI.
2. Claim(s) for chiropractic evaluation and manipulative treatment in the 60 days preceding the lumbar
spine MRI.
3. Claim(s) for evaluation and management (E&M) (e.g., office visits) in the period >28 days and <60
days preceding the lumbar spine MRI.
[

]

[

]

[

]

Code-level information to identify the initial patient population, exclusions, and numerator quality actions
appear below.
[

]

Rationale: OP-8 aims to promote use of high-quality, efficient care; reduce unnecessary exposure to contrast
materials; ensure adherence to evidence-based medicine and clinical practice guidelines; and provide data to
consumers and other stakeholders about imaging use at the facility, state, and national level.
[

]

Measure Results Interpretation: Lower scores are better. This means that a high-performing facility
reports a value near zero percent, whereas a facility that may be performing too many inappropriate MRI
lumbar spine studies scores closer to 100 percent.
[

]

[

Data Source: Medicare FFS claims.

]

Numerator Statement: Of Medicare FFS beneficiaries in the denominator, the number of MRI of the
lumbar spine studies with a diagnosis of low back pain without having claims-based evidence of antecedent
conservative therapy prior to the index imaging study.
[

]

•

Numerator Codes and Time Windows
o Indications of claims-based antecedent conservative therapy include any Current Procedural
Terminology (CPT®) codes in the following three groups:
[

]

[

]

Name

Code Type

Organizational ID

Look-Back Period

Chiropractic evaluation and
manipulation

CPT

2.16.840.1.113883.3.3157.1803

≤60 days prior to index MRI

Evaluation and management

CPT

2.16.840.1.113883.3.3157.1804

28–60 days prior to index MRI

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Name

Code Type

Organizational ID

Look-Back Period

CPT

2.16.840.1.113883.3.3157.1802

≤60 days prior to index MRI

Physical therapy

Denominator Statement: Number of MRI of the lumbar spine studies with a diagnosis of low back pain on
the imaging claim within a six-month window of claims data performed on Medicare FFS beneficiaries at
outpatient hospital facilities reimbursed through the Outpatient Prospective Payment System (OPPS).
Individuals can be included in the measure’s initial patient population multiple times; each MRI lumbar
spine study with a diagnosis of low back pain on the imaging claim performed at a facility measured under
OPPS is counted once in the measure’s denominator.
[

]

•

Denominator Codes and Time Windows
o Indications of low back pain include International Classification of Disease, Version 10 (ICD-10)
codes that appear on the MRI claim:
[

]

[

]

Name

Code Type

Organizational ID

Look-Back Period

Biomechanical lesion, not
elsewhere classified

ICD-10

2.16.840.1.113883.3.3157.1812

On the index MRI claim

Dislocation and sprain of joints
and ligaments of lumbar spine and
pelvis

ICD-10

2.16.840.1.113883.3.3157.1813

On the index MRI claim

MRI lumbar spine procedures

CPT

2.16.840.1.113883.3.3157.1805

On the index MRI claim

Other deforming dorsopathies

ICD-10

2.16.840.1.113883.3.3157.1809

On the index MRI claim

Other dorsopathies

ICD-10

2.16.840.1.113883.3.3157.1811

On the index MRI claim

Spondylopathies

ICD-10

2.16.840.1.113883.3.3157.1810

On the index MRI claim

Excluded Conditions: The OIE measures are not risk adjusted; instead, Medicare FFS beneficiaries who
have a clinical diagnosis of one or more conditions for which imaging is considered appropriate are excluded
from the measure. That is, these Medicare FFS beneficiaries are removed from the denominator, as well as
from the numerator, since the numerator involves identifying Medicare FFS beneficiaries from the
denominator.
[

]

For OP-8, Medicare FFS beneficiaries with a history of certain red-flag conditions are excluded from the
measure. These include Medicare FFS beneficiaries with a history of lumbar spine surgery, cancer,
congenital spine and spinal cord malformations, inflammatory and autoimmune disorders, infectious
conditions including intraspinal abscess, spinal vascular malformations and/or occult subarachnoid
hemorrhage, spinal cord infarction, neoplastic abnormalities, radiation therapy, spinal abnormalities
associated with scoliosis, syringohydromyelia, postoperative fluid collections and soft tissue changes,
trauma, intravenous (IV) drug use, neurologic impairment, human immunodeficiency virus (HIV), and other
unspecified immune deficiencies. Thus, any Medicare FFS beneficiary with a history of one or more of these
conditions is excluded from the measure’s denominator and numerator.
[

]

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•

Codes and Look-Back Period for Excluded Diagnoses
o Indications of a red-flag condition include CPT or ICD-10 codes that appear in the Medicare FFS
beneficiary’s claims history:
[

]

[

]

Name

Code Type

Organizational ID

Look-Back Period

Cancer

ICD-10

2.16.840.1.113883.3.3157.1832

Up to 365 days prior to index MRI

Congenital spine and spinal cord
malformations

ICD-10

2.16.840.1.113883.3.3157.1833

Up to 5 years prior to index MRI

HIV

ICD-10

2.16.840.1.113883.3.3157.1846

Up to 365 days prior to index MRI

Inflammatory and autoimmune
disorders

ICD-10

2.16.840.1.113883.3.3157.1834

Up to 5 years prior to index MRI

Infectious conditions

ICD-10

2.16.840.1.113883.3.3157.1835

Up to 365 days prior to index MRI

Intraspinal abscess

ICD-10

2.16.840.1.113883.3.3157.4069

On the MRI claim

IV drug abuse

ICD-10

2.16.840.1.113883.3.3157.1844

Up to 365 days prior to index MRI

CPT

2.16.840.1.113883.3.3157.18143

Up to 90 days prior to index MRI

Neoplastic abnormalities

ICD-10

2.16.840.1.113883.3.3157.1838

Up to 5 years prior to index MRI

Neurological impairment

ICD-10

2.16.840.1.113883.3.3157.1845

Up to 365 days prior to index MRI

Postoperative fluid collections and
soft tissue changes

ICD-10

2.16.840.1.113883.3.3157.1842

Up to 365 days prior to index MRI

Spinal abnormalities associated
with scoliosis

ICD-10

2.16.840.1.113883.3.3157.1840

Up to 5 years prior to index MRI

Spinal cord infarction

ICD-10

2.16.840.1.113883.3.3157.1837

Up to 365 days prior to index MRI

Spinal vascular malformations
and/or the cause of occult
subarachnoid hemorrhage

ICD-10

2.16.840.1.113883.3.3157.1836

Up to 5 years prior to index MRI

Syringohydromyelia

ICD-10

2.16.840.1.113883.3.3157.1841

Up to 5 years prior to index MRI

Trauma

ICD-10

2.16.840.1.113883.3.3157.1843

Up to 45 days prior to index MRI

Treatment fields for radiation
therapy

ICD-10

2.16.840.1.113883.3.3157.1839

Up to 5 years prior to index MRI

Unspecified immune deficiencies

ICD-10

2.16.840.1.113883.3.3157.1847

Up to 365 days prior to index MRI

Lumbar spine surgery

Detailed specifications for OP-8 and the other OIE measures, including measure implementation
information, can be found via the following link: https://qualitynet.cms.gov/outpatient/measures/imagingefficiency.
Hospital OQR Specifications Manual
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Measure Information Form
Performance Measure Name: Abdomen Computed Tomography (CT)—Use of Contrast Material
[

]

Measure ID #: OP-10
Measure Set: Outpatient Imaging Efficiency (OIE) Measures
[

]

[

]

Description: This measure calculates the percentage of CT of the abdomen or abdomen and pelvis (referred
to as abdominopelvic CTs) studies that are performed without and with contrast out of all CT of the
abdomen or abdominopelvis studies performed—those without contrast, those with contrast, and those
without then with contrast. The measure is calculated based on a one-year window of claims data.
[

]

[

[

]

[

]

]

[

[

[

]

[

]

[

]

]

]

Rationale: OP-10 aims to promote use of high-quality, efficient care; reduce unnecessary exposure to
radiation and contrast materials; ensure adherence to evidence-based medicine and clinical practice
guidelines; and provide data to consumers and other stakeholders about imaging use at the facility, state, and
national level.
[

]

Measure Results Interpretation: Lower scores are better. This means that a high-performing facility
reports a value near 0 percent, whereas a facility that may be performing too many CTs of the abdomen or
abdominopelvis studies without then with contrast scores closer to 100 percent.
[

]

[

Data Source: Medicare fee-for-service (FFS) claims.

]

Numerator Statement: Among CT studies of the abdomen or abdominopelvis in the denominator, the
number of CT abdomen and abdominopelvis studies performed without then with contrast (also referred to as
combined studies).
[

]

•

[

Numerator Codes

]

o The following Current Procedural Terminology (CPT®) code category is included in the measure
numerator:
[

]

Name

Code Type

Abdomen CT Without then With Contrast

CPT

Organizational ID
2.16.840.1.113883.3.3157.21

Denominator Statement: The number of CT studies of the abdomen or abdominopelvis performed—
without contrast, with contrast, or without then with contrast—within a one-year window of Medicare FFS
claims data for beneficiaries whose imaging was performed at outpatient hospital facilities reimbursed
through the Outpatient Prospective Payment System (OPPS). Medicare FFS beneficiaries can be included in
the measure’s initial patient population multiple times; each abdomen or abdominopelvis CT (without
contrast, with contrast, or both with and without contrast) performed at a facility measured under OPPS is
counted once in the measure’s denominator.
[

]

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•

[

Denominator Codes

]

o The following International Classification of Disease, Version 10 (ICD-10) and CPT code categories
are used to identify the measure denominator population:
[

]

Name

Code Type

Organizational ID

Abdomen CT Without Contrast

ICD-10

2.16.840.1.113883.3.3157.1

Abdomen CT With Contrast

ICD-10

2.16.840.1.113883.3.3157.2

CPT

2.16.840.1.113883.3.3157.21

Abdomen CT Without then With Contrast

Excluded Conditions: The OIE measures are not risk adjusted; instead, Medicare FFS beneficiaries who
have a clinical diagnosis of one or more conditions for which imaging is considered appropriate are excluded
from the measure. That is, these Medicare FFS beneficiaries are removed from the denominator, as well as
from the numerator, since the numerator involves identifying Medicare FFS beneficiaries from the
denominator.
[

]

For OP-10, Medicare FFS beneficiaries whose abdomen CT had one of the following clinical diagnoses
recorded on the claim are excluded from the measure’s initial patient population; these conditions include:
[

]

•
•
•
•
•
•
•
•
•
•
•

[

[

[

[

[

[

[

[

[

[

[

Adrenal mass;

]

Diseases of the urinary system;

]

Hematuria;

]

Infections of kidney;
Jaundice;

]

]

Liver lesion (mass or neoplasm);
Malignant neoplasm of bladder;

]

]

Malignant neoplasm of pancreas;
Non-traumatic aortic disease;
Pancreatic disorders; and

]

]

]

Unspecified disorder of kidney or ureter.

]

For all conditions, clinical evidence exists (within a clinical practice guideline or the peer-reviewed
literature) that indicates performing a CT study of the abdomen and/or abdominopelvis may be appropriate
care. Consequently, any Medicare FFS beneficiary with one or more of these conditions documented on the
CT claim is excluded from the measure.
[

]

•

[

Denominator Exclusion Codes

]

o The following ICD-10 code categories are excluded from the denominator population:
[

Name

]

Code Type

Organizational ID

Adrenal Mass

ICD-10

2.16.840.1.113883.3.3157.1017

Diseases of the Urinary System

ICD-10

2.16.840.1.113883.3.3157.1019

Hospital OQR Specifications Manual
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Name

Code Type

Organizational ID

Hematuria

ICD-10

2.16.840.1.113883.3.3157.1020

Infections of the Kidney

ICD-10

2.16.840.1.113883.3.3157.1021

Jaundice

ICD-10

2.16.840.1.113883.3.3157.1022

Liver Lesion (Mass or Neoplasm)

ICD-10

2.16.840.1.113883.3.3157.1023

Malignant Neoplasm of Bladder

ICD-10

2.16.840.1.113883.3.3157.1024

Malignant Neoplasm of the Pancreas

ICD-10

2.16.840.1.113883.3.3157.1025

Non-Traumatic Aortic Disease

ICD-10

2.16.840.1.113883.3.3157.1026

Pancreatic Diseases

ICD-10

2.16.840.1.113883.3.3157.1027

Unspecified Disorder of the Kidney And Ureter

ICD-10

2.16.840.1.113883.3.3157.1028

Detailed specifications for OP-10 and the other OIE measures, including measure implementation
information, can be found via the following link: https://qualitynet.cms.gov/outpatient/measures/imagingefficiency.

Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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Measure Information Form
Performance Measure Name: Cardiac Imaging for Preoperative Risk Assessment for Non-Cardiac
Low-Risk Surgery
Measure ID #: OP-13
Measure Set: Outpatient Imaging Efficiency (OIE) Measures
[

]

[

]

Description: This measure calculates the percentage of stress echocardiography, single photon emission
computed tomography myocardial perfusion imaging (SPECT MPI), coronary computed tomography
angiography (CCTA), or stress magnetic resonance imaging (MRI) studies performed at a hospital outpatient
facility in the 30 days prior to an ambulatory, non-cardiac, low-risk surgery performed in any location (e.g.,
within the same facility as the cardiac imaging, at another hospital unaffiliated with the site of the index
cardiac imaging, or within a physician’s office).
[

]

[

]

Rationale: OP-13 aims to promote use of high-quality, efficient care; reduces unnecessary exposure to
radiation and contrast materials; ensure adherence to evidence-based medicine and clinical practice
guidelines; and provide data to consumers and other stakeholders about imaging use at the facility, state, and
national level.
Measure Results Interpretation: Lower scores are better. This means that a high-performing facility
reports a value near 0 percent, whereas a facility that may be performing too many stress echocardiography,
SPECT MPI, stress MRI, or CCTA studies before an ambulatory, non-cardiac, low-risk surgery scores closer
to 100 percent.
Data Source: Medicare fee-for-service (FFS) claims.
Numerator Statement: Of cardiac imaging studies in the denominator, the number of stress
echocardiography, SPECT MPI, stress MRI, and CCTA studies performed within a hospital outpatient
department in the 30 days preceding a non-cardiac, low-risk surgery performed at any location.
•

Numerator Codes and Time Windows
o Of the stress echocardiography, SPECT MPI, stress MRI, and CCTA imaging procedures included in
the denominator, the following procedures, identified using Current Procedural Terminology (CPT®)
codes for non-cardiac, low-risk surgery, are included in the numerator if they occur on the same day
or within 30 days following the cardiac imaging:
Code Type

Organizational ID

Look-Forward Period1

Surgery/Integumentary System:
Breast

CPT

2.16.840.1.113883.3.3157.1301

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Respiratory System:
Accessory Sinuses

CPT

2.16.840.1.113883.3.3157.1302

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Name

1

Non-cardiac, low-risk surgeries may occur between July 01 and June 30 of the measurement year.

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Code Type

Organizational ID

Look-Forward Period1

Surgery/Respiratory System:
Trachea and Bronchi

CPT

2.16.840.1.113883.3.3157.1303

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Respiratory System:
Lungs And Pleura

CPT

2.16.840.1.113883.3.3157.1305

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System:
Esophagus

CPT

2.16.840.1.113883.3.3157.13064

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System:
Intestines (except Rectum)

CPT

2.16.840.1.113883.3.3157.1307

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System: Rectum

CPT

2.16.840.1.113883.3.3157.1308

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System: Anus

CPT

2.16.840.1.113883.3.3157.1309

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System: Biliary
Tract

CPT

2.16.840.1.113883.3.3157.1310

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System:
Abdomen, Peritoneum, and
Omentum

CPT

2.16.840.1.113883.3.3157.1311

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System: Kidney

CPT

2.16.840.1.113883.3.3157.1312

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System: Ureter

CPT

2.16.840.1.113883.3.3157.13133

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Digestive System: Bladder

CPT

2.16.840.1.113883.3.3157.1314

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Female Genital System:
Cervix Uteri

CPT

2.16.840.1.113883.3.3157.1315

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Female Genital System:
Corpus Uteri

CPT

2.16.840.1.113883.3.3157.1316

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Female Genital System:
Oviduct/Ovary

CPT

2.16.840.1.113883.3.3157.1317

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Surgery/Eye And Ocular Adnexa:
Anterior Segment

CPT

2.16.840.1.113883.3.3157.1318

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Other Surgeries

CPT

2.16.840.1.113883.3.3157.13193

On the same day or within 30 days
of a non-cardiac, low-risk surgery

Name

Denominator Statement: The number of stress echocardiography, SPECT MPI, stress MRI, and CCTA
studies performed within a hospital outpatient department within a one-year window of claims data
performed on Medicare FFS beneficiaries at outpatient hospital facilities reimbursed through the OPPS.
Beneficiaries can be included in the measure’s initial patient population multiple times; each stress
echocardiography, SPECT MPI, stress MRI, and CCTA studies performed at a facility measured by OPPS in
the 30 days prior to a low-risk surgery is counted once in the measure’s denominator.

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•

Denominator Codes and Time Windows
o The following CPT and Healthcare Common Procedure Coding System (HCPCS) code categories are
used to identify the measure denominator procedures:
Name

Code Type

Organizational ID

CPT

2.16.840.1.113883.3.3157.1323

SPECT MPI

CPT, HCPCS

2.16.840.1.113883.3.3157.13202

Stress echocardiography

CPT, HCPCS

2.16.840.1.113883.3.3157.13213

Stress MRI

CPT, HCPCS

2.16.840.1.113883.3.3157.13222

CCTA

Time Window2
July 1 through May 31 of the
measurement period
July 1 through May 31 of the
measurement period
July 1 through May 31 of the
measurement period
July 1 through May 31 of the
measurement period

Excluded Conditions: The OIE measures are not risk adjusted; instead, Medicare FFS beneficiaries who
have a clinical diagnosis of one or more conditions for which imaging is considered appropriate are excluded
from the measure. That is, these Medicare FFS beneficiaries are removed from the denominator, as well as
from the numerator, since the numerator involves identifying Medicare FFS beneficiaries from the
denominator.
For OP-13, Medicare FFS beneficiaries with a history of at least three diagnoses from the following
categories are excluded from the measure’s initial patient population:
•

Diabetes mellitus;

•

Renal insufficiency;

•

Stroke or transient ischemic attack (TIA);

•

Prior heart failure; and

•

Ischemic heart disease.

For these conditions, clinical evidence exists (within a practice guideline or the peer-reviewed literature) that
indicates these beneficiaries may be at high risk of cardiac complication during low-risk surgery.
Consequently, performing a stress echocardiography, SPECT MPI, stress MRI, or CCTA study prior to an
ambulatory non-cardiac, low-risk surgery may be appropriate care for these high-risk patients. Any Medicare
FFS beneficiary with a history of three or more of these conditions is excluded from the measure.
Additionally, patients that received cardiac imaging in the emergency department (ED) or in the 30 days
following an ED encounter are excluded from the measure as they often have a different clinical indication
than those performed in other hospital outpatient care settings.
•

Denominator Exclusion Codes
o

The following ICD-10 and CPT code categories are excluded from the measure denominator
population:
Name

2

Code Type

Organizational ID

Look-Back Period

Cardiac imaging procedures may occur between July 01 and May 31 of the measurement year. This allows for a 30-day lookforward period following the imaging to identify non-cardiac, low-risk surgeries.

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Name

Code Type

Organizational ID

ICD-10

2.16.840.1.113883.3.3157.1329

CPT

2.16.840.1.113883.3.3157.4057

Ischemic Heart Disease

ICD-10

2.16.840.1.113883.3.3157.1333

Prior Heart Failure

ICD-10

2.16.840.1.113883.3.3157.1332

Renal Insufficiency

ICD-10

2.16.840.1.113883.3.3157.1330

Stroke/Transient Ischemic Attack

ICD-10

2.16.840.1.113883.3.3157.1331

Diabetes Mellitus
Emergency Department Imaging

Look-Back Period
Up to one year prior to cardiac
imaging
On the same day or within the 30
days following an ED encounter3
Up to three years prior to cardiac
Imaging
Up to three years prior to cardiac
imaging
Up to one year prior to cardiac
imaging
Up to three years prior to cardiac
imaging

Detailed specifications for OP-13 and the other OIE measures, including measure implementation
information, can be found via the following link: https://qualitynet.cms.gov/outpatient/measures/imagingefficiency.

3

ED encounters may occur between June 01 (up to 30 days prior to the start of the measurement period) and May 31 of the
measurement year. This allows for a 30-day look-forward period following the ED encounter to identify potentially related
cardiac imaging.

Hospital OQR Specifications Manual
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Measure Information Form
Performance Measure Name: Breast Cancer Screening Recall Rates
Measure ID #: OP-39
Measure Set: Outpatient Imaging Efficiency (OIE) Measures
[

]

[

]

Description: This measure calculates the percentage of mammography or digital breast tomosynthesis
(DBT) screening studies that are followed by a diagnostic mammography, diagnostic DBT, ultrasound of the
breast , or magnetic resonance imaging (MRI) of the breast occurring on the same day or in the 45 days
following the index screening study, performed in an outpatient or office setting.
[

]

[

]

Rationale: OP-39 aims to promote use of high-quality, efficient care; reduce unnecessary exposure to
radiation and contrast materials; ensure adherence to evidence-based medicine and clinical practice
guidelines; and provide data to consumers and other stakeholders about imaging use at the facility, state, and
national level.
Measure Results Interpretation: If a facility’s score is lower than 5 percent, that facility may be missing
cases of cancer; if their score is above 12 percent, the facility may be recalling too many Medicare Fee-forService (FFS) beneficiaries for follow-up imaging (Lee et al. 2018). For OP-39, facilities with performance
rates that are greater than 5 percent and less than 12 percent are likely recalling an appropriate number of
beneficiaries following a screening mammogram or DBT study.
Data Source: Medicare FFS claims.
Numerator Statement: Of studies in the denominator, the number of diagnostic mammograms, diagnostic
DBTs, ultrasounds of the breast, and MRIs of the breast that are performed on the same day or within 45
days of the screening mammogram or screening DBT study, occurring in an outpatient or office setting
during the measurement period.
•

Numerator Codes and Time Windows
o The following Current Procedural Terminology (CPT®) and Healthcare Common Procedure Coding
System (HCPCS) code categories and look back periods are included in the measure numerator:
Name

Code Type

Organizational ID

Diagnostic Mammography Study

CPT
HCPCS

2.16.840.1.113883.3.3157.190123

Diagnostic DBT Study

CPT
HCPCS

2.16.840.1.113883.3.3157.4066

CPT

2.16.840.1.113883.3.3157.1902

CPT
HCPCS

2.16.840.1.13883.3.3157.4068

Ultrasound Of The Breast Study

MRI of the Breast Study

Look-Forward Period
On the same day or within 45 days
of the screening mammography or
DBT
On the same day or within 45 days
of the screening mammography or
DBT
On the same day or within 45 days
of the screening mammography or
DBT
On the same day or within 45 days
of the screening mammography or
DBT

Denominator Statement: The number of screening mammograms and screening DBTs performed for
Medicare FFS beneficiaries within outpatient hospital facilities reimbursed through the Outpatient
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Prospective Payment System (OPPS) during the measurement period. Beneficiaries can be included in the
measure’s initial patient population multiple times; each mammography and DBT screening performed at a
facility measured under OPPS is counted once in the measure’s denominator.
•

Denominator Codes
o The following CPT and HCPCS code categories are used to identify the measure denominator
population:
Name
Screening Mammography and DBT Studies

Code Type
CPT
HCPCS

Organizational ID
2.16.840.1.113883.3.3157.190412

Excluded Conditions: The OIE measures are not risk adjusted; instead, Medicare FFS beneficiaries who
have a clinical diagnosis of one or more conditions for which imaging is considered appropriate are excluded
from the measure. That is, these Medicare FFS beneficiaries are removed from the denominator, as well as
from the numerator, since the numerator involves identifying Medicare FFS beneficiaries from the
denominator.
There are currently no conditions excluded from OP-39.
Detailed specifications for OP-39 and the other OIE measures, including measure implementation
information, can be found via the following link: https://qualitynet.cms.gov/outpatient/measures/imagingefficiency.
References:
Lee CS, Parise C, Burleson J, & Seidenwurm D. (2018). Assessing the Recall Rate for Screening
Mammography: Comparing the Medicare Hospital Compare Dataset With the National Mammography
Database. American Journal of Roentgenology, 211(1):127-132. doi:10.2214/AJR.17.19229.

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Measure Information Form
Performance Measure Name: Appropriate Follow-up Interval for Normal Colonoscopy in Average
Risk Patients
Measure ID #: OP-29
Measure Set: Measures submitted via a Web-based Tool
Description: Percentage of patients aged 50 to 75 years of age receiving a screening colonoscopy without
biopsy or polypectomy who had a recommended follow-up interval of at least 10 years for repeat
colonoscopy documented in their colonoscopy report.
Numerator Statement: Patients who had a recommended follow-up interval of at least 10 years for
repeat colonoscopy documented in their colonoscopy report.
Denominator Statement: All patients aged 50 to 75 years of age receiving screening colonoscopy
without biopsy or polypectomy.
Denominator Criteria (Eligible Cases):
Patients aged ≥ 50 and ≤ 75 on date of encounter
and
ICD-10-CM Diagnosis code: Z12.11
and
CPT or HCPCS: 44388, 45378, G0121
without
CPT Category I Modifiers: 52, 53, 73, 74
without
ICD-10-CM Diagnosis codes: Z83.71, Z86.010, Z80.0, Z85.038
Denominator Exclusions:
• Documentation of medical reason(s) for not recommending at least a 10-year follow-up interval (e.g.,
inadequate prep, familial or personal history of colonic polyps, patient had no adenoma and age is ≥66
years old, or life expectancy is <10years, other medical reasons). Medical reason(s) are at the discretion
of the physician. Documentation indicating no follow-up colonoscopy is needed or recommended is only
acceptable if the patient’s age is documented as ≥66 years old, or life expectancy <10 years.
Documentation of a medical condition or finding can be used as a medical reason(s) for denominator
exclusion purposes only if the documented recommended follow-up interval is less than 10 years.
Examples:
▪ Diverticulitis documented in the medical record and a follow-up interval of 5 years in the
colonoscopy report.
▪ Family history of colon cancer and a follow-up interval of 3 years documented in the
colonoscopy report.
▪ Less than adequate prep documented in the medical record with a repeat colonoscopy in
3 years in the colonoscopy report.

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Annual data submission period: See the timeline posted to QualityNet.CMS.gov for this measure; select
Hospitals-Outpatient and then Participation tab. Data will be completed through the Hospital Quality
Reporting (HQR) system at https://hqr.cms.gov via an online tool available to authorized users.
Additional instructions: Patients will be counted in the numerator if there is reference in the final
colonoscopy report that the appropriate follow-up interval for the repeat colonoscopy is at least 10 years
from the date of the current colonoscopy (i.e., the colonoscopy performed during the measurement period). A
range that includes “10 years” (e.g., 7 to 10 years) is not acceptable.

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Measure Information Form
Performance Measure Name: Cataracts – Improvement in Patient’s Visual Function within 90 Days
Following Cataract Surgery
Measure ID #: OP-31*
Measure Set: Measures submitted via a Web-based Tool
Description: Percentage of patients aged 18 years and older who had cataract surgery and had
improvement in visual function achieved within 90 days following the cataract surgery, based on
completing a pre-operative and post-operative visual function survey.
Numerator Statement: Patients 18 years and older who had improvement in visual function achieved
within 90 days following cataract surgery, based on completing both a pre-operative and post-operative
visual function survey.
Denominator Statement: All patients aged 18 years and older who had cataract surgery and completed
both a pre-operative and post-operative visual function survey.
Denominator Criteria (Eligible Cases):
Patients aged ≥ 18 years
and
CPT (without modifiers 55, 56): 66840, 66850, 66852, 66920, 66930, 66940, 66982, 66983, 66984,
66987, 66988
Excluded Populations: Patients who did not complete both a pre-operative and post-operative survey.
Annual data submission period: See the timeline posted to QualityNet.CMS.gov for this measure; select
Hospitals-Outpatient and then Participation tab. Data will be completed through the Hospital Quality
Reporting (HQR) system at https://hqr.cms.gov via an online tool available to authorized users.
Data Collection Approach: Include procedures performed from the beginning of the reporting year through
90 days prior to the end of the reporting period. This will allow the post-operative period to occur.
Definition for Survey: The data collection instrument is specified as an assessment tool that has been
appropriately validated for the population for which it is being used. The surveys can be completed by
phone, mail, email, or during physician follow-up. The same data collection instrument used pre-operatively
must be used post-operatively.
Examples of tools for visual function assessment include, but are not limited to the National Eye Institute
Visual Function Questionnaire (VFQ - http://www.rand.org/health/surveys_tools/vfq.html), the Visual
Function (VF)-14, the modified VF-8, the Activities of Daily Vision Scale (ADVS), the Catquest, and the
modified Catquest-9. For each of the VF tools (VF-14 or VF-8R), all questions have equal weight, only
non-missing questions are included, and the total weight is 100.

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Definition of Performance Met: Improvement in visual function achieved within 90 days following cataract
surgery (G0913).
Definition of Performance Not Met: Improvement in visual function not achieved within 90 days following
cataract surgery (G0915).
Denominator Exception: Patient care survey was not completed by patient (G0914).
*Finalized in the Calendar Year (CY) 2015 Outpatient Prospective Payment System
(OPPS)/Ambulatory Surgical Center (ASC) Final Rule, hospitals have the option to voluntarily
collect and submit data for OP-31 for the CY 2017 payment determination and subsequent years. All
data submitted voluntarily will be publicly reported as discussed in the CY 2014 OPPS/ASC
Proposed Rule (78 FR 43645) and Final Rule with comment period (78 FR 75092).

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Measure Information Form
Performance Measure Name: COVID-19 Vaccination Coverage Among Health Care Personnel (HCP)
Measure ID #: OP-38
Measure Set: Measures submitted via a web-based tool (NHSN)
Description: For more information about the National Healthcare Safety Network (NHSN) measures, see
the resources located at http://www.cdc.gov/nhsn/.
Annual data submission period: See the timeline posted to QualityNet.cms.gov for this measure; select
Hospitals-Outpatient then click the Learn More dial, then select Participation from the banner options.
Direct questions regarding NHSN training, enrollment, and submission to: [email protected].
Denominator: Number of HCP eligible to work in the Hospital Outpatient for at least one day during the
reporting period, excluding persons with contraindications to COVID–19 vaccination that are described by
the CDC.
[

]

Numerator: Cumulative number of HCP eligible to work in the Hospital Outpatient for at least one day
during the reporting period and who received a complete vaccination course against COVID–19.
[

]

[

Definitions*:

All Core HCP: Sum of Employees (staff on facility payroll), Licensed independent practitioners:
Physicians, advanced practice nurses, physician assistants, and adult students/trainees and volunteers.
Complete Primary Series: Completing a primary vaccine series means receiving: 2-dose series of an
mRNA COVID-19 vaccine (Pfizer-BioNTech and Moderna), OR a single dose of Johnson & Johnson’s
Janssen COVID-19 vaccine. A complete vaccination course may require multiple doses or regular
revaccination.
Information on Key Terms and Up-to-Date Vaccination can be downloaded here:
https://www.cdc.gov/nhsn/pdfs/hps/covidvax/UpToDateGuidance-508.pdf

]

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Centers for Medicare & Medicaid Services (CMS)
Facility 7-Day Risk-Standardized Hospital Visit Rate after Outpatient Colonoscopy
Introduction
This section of the manual includes the Measure Information Form (MIF) for the CMS Facility 7-Day
Risk-Standardized Hospital Visit Rate after Outpatient Colonoscopy measure. This is an administrative
claims-based measure; there is no data abstraction responsibility on the part of the facility. The measure
includes outpatient colonoscopies performed among Medicare Fee-for-Service (FFS) beneficiaries aged 65
years and older.
CMS will use the measure results in the Hospital Outpatient Quality Reporting (OQR) Program for
payment determination in calendar year 2026.
This measure was developed by a team of clinical and statistical experts from the Yale New Haven Health
Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE), under contract to
CMS. The measure is currently consensus-based-entity (CBE) endorsed (CMS Measures Information Tool
[CMIT] program-specific version number 00253-01-C-HOQR).1
[

]

The aim of the MIF is to provide transparency of the measure methodology to the facility and vendor
communities. Additional background information about the measure methodology can be found in the
Measure Updates and Specifications Report available on the Colonoscopy Measure Methodology QualityNet
page (https://qualitynet.cms.gov/outpatient/measures/colonoscopy/methodology).
CMS provides a new report each year to align with the most current calendar year. For example, the 2018
Measure Updates and Specifications Report aligned with a performance period ending in calendar year 2018.
If the re-evaluation report associated with the performance period of this MIF is not yet available, it is
sufficient to use the most recent report. Please submit questions about the measure to the QualityNet
Question and Answer Tool here: https://cmsqualitysupport.servicenowservices.com/qnet_qa.
CMS calculates a facility-level risk-standardized unplanned hospital visit rate for all eligible facilities.
Facilities and their ORYX® Vendors do not have sufficient data to produce facilities’ risk-standardized
results. CMS uses inpatient and outpatient claims data to determine whether a beneficiary has had an
unplanned hospital visit to any acute care hospital within seven days of the outpatient colonoscopy. In
addition, CMS extracts and utilizes physician office, inpatient, and outpatient claims data from the year prior
to the colonoscopy, as well as claims data from the colonoscopy, to risk adjust the facility-level outcome
rates.

1
[

CMIT refers to the CMS Measures Inventory Tool available at: https://cmit.cms.gov/cmit/#

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Measure Information Form
Performance Measure Name: Facility 7-Day Risk-Standardized Hospital Visit Rate after Outpatient
Colonoscopy
Measure ID #: OP-32
Measure Set: CMS Outcome Measures (Claims-Based)
Description: The Facility 7-Day Risk-Standardized Hospital Visit Rate after Outpatient Colonoscopy
Measure, hereafter referred to as the colonoscopy measure, estimates a facility-level rate of riskstandardized, all-cause, unplanned hospital visits within seven days of an outpatient colonoscopy among
Medicare FFS patients aged 65 years and older.
Rationale: The colonoscopy measure will reduce adverse patient outcomes associated with preparation for
colonoscopy, the procedure itself, and follow-up care by capturing and making more visible to providers and
patients all unplanned hospital visits following the procedure. The measure score will assess quality and
inform quality improvement.
Type of Measure: Outcome
Improvement Noted As: A decrease in the facility-level risk-standardized unplanned hospital visit rate.
Lower rate indicates better quality.
Numerator Statement:
This outcome measure does not have a traditional numerator and denominator like a core process measure
(e.g., percentage of adult patients with diabetes aged 18 to 75 years receiving one or more hemoglobin A1c
tests per year); thus, we are using this field to define the outcome. The calculation of the rate is defined under
the Measure Calculation section below.
The outcome for this measure is all-cause, unplanned hospital visits within seven days of an outpatient
colonoscopy. The measure defines a hospital visit as any emergency department (ED) visit, observation stay,
or unplanned inpatient admission.
Denominator Statement:
The target population for this measure includes low-risk colonoscopies performed in the outpatient setting
for Medicare FFS patients aged 65 years and older. For implementation in the Hospital Outpatient Quality
Reporting Program, the measure will be calculated among hospital outpatient departments.
Included Populations:
Outpatient colonoscopies for Medicare FFS patients aged 65 years and older. Medicare FFS beneficiaries
with an outpatient colonoscopy are included if the patient has been enrolled in Part A and Part B Medicare
for up to 12 months prior to the date of procedure to ensure the availability of administrative data for
risk adjustment.

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The measure is focused on low-risk colonoscopies. Cohort codes are located in the data dictionary that
accompanies the Measure Updates and Specifications Report, on the Colonoscopy Measure Methodology
QualityNet page: https://qualitynet.cms.gov/outpatient/measures/colonoscopy/methodology.
The measure does not include colonoscopy Current Procedural Terminology (CPT®) procedure codes that
reflect fundamentally higher-risk or different procedures. Qualifying colonoscopies billed with a concurrent
high-risk colonoscopy procedure code are not included in the measure; the data dictionary that accompanies
the most recent Measure Updates and Specifications Report at the link above contains the complete listing of
all high-risk procedure codes.
Cohort Exclusions (Excluded Colonoscopies):
See the Measure Updates and Specifications Report available on the Measure Methodology QualityNet page
for detailed measure cohort exclusion criteria:
https://qualitynet.cms.gov/outpatient/measures/colonoscopy/methodology. The accompanying data
dictionary file to the report contains current exclusion codes.
[

Admissions Not Counted in the Outcome (“Planned Admissions”):
Admissions identified as planned by the planned admission algorithm are not counted in the outcome. The
“algorithm” is a set of criteria for classifying admissions as planned using Medicare claims. The algorithm
identifies admissions that are typically planned and may occur within seven days of an outpatient
colonoscopy. CMS based the planned admission algorithm on three principles:
1. A few specific, limited types of care are always considered planned (transplant surgery, maintenance
chemotherapy, rehabilitation);
2. Otherwise, a planned admission is defined as a non-acute admission for a scheduled procedure; and
3. Admissions for acute illness or for complications of care are never planned.
The planned admission algorithm uses a flowchart and four tables of procedures and conditions to
operationalize these principles and to classify inpatient admissions as planned. ED visits and observation
stays are never considered planned. The flowchart and tables are in the Measure Updates and Specifications
Report available on the Colonoscopy Measure Methodology QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/colonoscopy/methodology.
Risk Adjustment:
The measure’s approach to risk adjustment is tailored to, and appropriate for, a publicly reported outcome
measure as articulated in published scientific guidelines (Krumholz et al., 2006; Normand et al., 2007).
The measure uses a two-level hierarchical logistic regression model to estimate facility-level riskstandardized hospital visit rates. This approach accounts for the clustering of patients within facilities and
variation in sample size across facilities.
The risk-adjustment model has 15 patient-level variables (age, concomitant upper gastrointestinal endoscopy,
polypectomy during the procedure, and 12 comorbidity variables). The measure defines comorbidity
variables using condition categories (CCs), which are clinically meaningful groupings of the many thousands
of International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) diagnosis
codes. Certain CCs are considered possible complications of care; therefore, the measure does not risk-adjust
for them if they occur only at the time of the procedure.
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Therefore, only comorbidities that convey information about the patient at the time of the procedure or in the
12 months prior, and not complications that arose during the colonoscopy procedure are included in the risk
adjustment. The Measure Updates and Specifications Report data dictionary contains complete definitions of
risk factors and CCs that are considered possible complications of care and are not risk-adjusted for if they
occur only at the time of the procedure.
Table 1: Patient-Level Risk-Adjustment Variables
Patient-Level Variables
Demographics
Procedural factors

Comorbidities

Risk-Adjusted Variables
Age (categorized; 65-69; 70-74; 75-79; 80-84; 85 and greater)
[

]

Endoscopy during Procedure
Polypectomy during Procedure
Congestive Heart Failure
Ischemic Heart Disease
Stroke/Transient Ischemic Attack
Chronic Lung Disease
Metastatic Cancer
Liver Disease
Iron Deficiency Anemia
Disorders of Fluid/Electrolyte/Acid-Base
Pneumonia
Psychiatric Disorders
Substance Abuse
Arrhythmias
Age Categorized x Arrhythmia Interaction

Note: The relationship between age and risk of a hospital visit within seven days was modified by the
presence or absence of a cardiac arrhythmia (p-value for interaction <0.001). Therefore, we included an
interaction term (age categorized x arrhythmia) in the final model.
Full details of the development of the risk-adjustment model for this measure are available on the
Colonoscopy Measure Archived Resources QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/colonoscopy/resources#tab2 .
[

]

Data Collection Approach: Medicare administrative claims and enrollment data.
Data Accuracy: The administrative claims data used to calculate the measure are maintained by CMS’
Office of Information Services. These data undergo additional quality assurance checks during measure
development and maintenance.
Measure Analysis Suggestions: None
Sampling: No
Data Reported As: Facility-level seven-day risk-standardized unplanned hospital visit rate following
outpatient colonoscopy.
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Measure Calculation:
The measure estimates facility-level seven-day risk-standardized unplanned hospital visit rates using
hierarchical logistic regression modeling (a form of hierarchical generalized linear modeling). In brief, the
approach simultaneously models two levels (patient and facility) to account for the variance in patient
outcomes within and between facilities. At the patient level, the model adjusts the log-odds of a hospital
visit within seven days of the procedure for age, procedural factors, and selected clinical covariates. At the
facility level, it estimates the facility-specific intercepts as arising from a normal distribution. The facilityspecific intercept represents the underlying risk of a hospital visit within seven days after a colonoscopy at
that facility while accounting for patient risk. The facility-specific intercepts also account for the clustering
(non-independence) of patients within the same facility. If there were no differences among facilities, the
facility-specific intercepts would be identical across all facilities after adjusting for patient risk.
The statistical modeling approach is described fully in the original technical report available on the
Colonoscopy Measure Archived Resources QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/colonoscopy/resources#tab2 .
[

]

Selected References:
• Krumholz HM, Brindis RG, Brush JE, et al. Standards for Statistical Models Used for Public Reporting
of Health Outcomes: An American Heart Association Scientific Statement from the Quality of Care and
Outcomes Research Interdisciplinary Writing Group: Cosponsored by the Council on Epidemiology and
Prevention and the Stroke Council Endorsed by the American College of Cardiology Foundation.
Circulation. 2006;113(3):456–462.
• Normand S-LT, Shahian DM. Statistical and Clinical Aspects of Hospital Outcomes Profiling. Statistical
Science. 2007; 22(2):206–226.

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Centers for Medicare & Medicaid Services (CMS)
Admissions and Emergency Department (ED) Visits for Patients
Receiving Outpatient Chemotherapy
Introduction
This section of the manual includes the Measure Information Form (MIF) for the CMS Admissions and
Emergency Department (ED) Visits for Patients Receiving Outpatient Chemotherapy measure. This is an
administrative claims-based measure, so there is no data abstraction responsibility on the part of the facility.
The measure includes Medicare fee-for-service (FFS) patients aged 18 years and older at the start of the
performance period with a diagnosis of any cancer (except leukemia), who received at least one outpatient
chemotherapy treatment at the reporting hospital during the performance period.
CMS will use the measure results in the Hospital Outpatient Quality Reporting (OQR) Program for payment
determination in calendar year 2026.
This measure was developed by a team of clinical and statistical experts from the Yale New Haven Health
Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE), under contract to
CMS. The measure is currently undergoing initial endorsement review as part of the consensus-based entity
(CBE) portfolio of cancer care measures.
[

]

The aim of the MIF is to provide transparency of the measure methodology to the facility and vendor
communities. Additional background information about the measure methodology can be found in the Measure
Updates and Specifications Report available on the Chemotherapy Measure Methodology QualityNet page
https://qualitynet.cms.gov/outpatient/measures/chemotherapy/methodology.
CMS provides a new report each year to align with the most current calendar year. For example, the 2018
Measure Updates and Specifications Report aligned with a performance period of calendar year 2018. If the reevaluation report associated with the performance period of this MIF is not yet available, it is sufficient to use
the most recent report. Please submit questions about the measure to the QualityNet Question and Answer Tool
here: https://cmsqualitysupport.servicenowservices.com/qnet_qa.
:[

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Measure Information Form (MIF)
Performance Measure Name: Admissions and Emergency Department Visits for Patients Receiving
Outpatient Chemotherapy
Measure ID #: OP-35
Measure Set: CMS Outcome Measures (Claims-Based)
Description: The Admission and Emergency Department (ED) Visits for Patients Receiving Outpatient
Chemotherapy Measure, hereafter referred to as the chemotherapy measure, estimates hospital-level, riskadjusted rates of inpatient admissions or ED visits for cancer patients aged 18 years and older for at least one
of the following diagnoses—anemia, dehydration, diarrhea, emesis, fever, nausea, neutropenia, pain,
pneumonia, or sepsis—within 30 days of hospital-based outpatient chemotherapy treatment. Rates of
admission and ED visits are calculated and reported separately.
[

]

Rationale: Chemotherapy treatment can have severe, predictable side effects, which, if inappropriately
managed, can reduce patients’ quality of life and increase healthcare utilization and costs. This measure aims
to assess the care provided to cancer patients and encourage quality improvement efforts to reduce the
number of potentially avoidable inpatient admissions, observation stays, and ED visits among cancer patients
receiving chemotherapy in a hospital outpatient setting. Improved management of these potentially
preventable clinical conditions that are frequent side effects of chemotherapy treatment—including anemia,
dehydration, diarrhea, emesis, fever, nausea, neutropenia, pain, pneumonia, or sepsis—could reduce
admissions and ED visits and increase patients’ quality of care and quality of life. This measure encourages
hospitals to use guidelines from the American Society of Clinical Oncology, National Comprehensive
Cancer Network, Oncology Nursing Society, Infectious Diseases Society of America, and other professional
societies to integrate and promote use of evidence-based interventions to prevent and treat common side
effects and complications of chemotherapy.
Type of Measure: Outcome
Improvement Noted As: A decrease in the hospital-level risk-adjusted rates of inpatient admissions or ED
visits. Lower rate indicates better quality.
Numerator Statement:
This outcome measure does not have a traditional numerator and denominator like a core process measure;
thus, we are using this field to define the outcome. The outcomes for this measure are one or more inpatient
admissions, and one or more ED visits or observation stays without an inpatient admission, for one of the
following diagnoses—anemia, dehydration, diarrhea, emesis, fever, nausea, neutropenia, pain, pneumonia, or
sepsis—within 30 days of receiving hospital-based outpatient chemotherapy treatment for cancer. These 10
conditions are potentially preventable through appropriately managed outpatient care. The qualifying
diagnosis on the inpatient admission or ED visit/observation visit claim must be (1) the principal diagnosis or
(2) a secondary diagnosis accompanied by a principal diagnosis of cancer.

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Outcomes are identified separately for the inpatient admissions and ED visits categories; a patient can only
qualify for an outcome in either category, but not both. Patients who experience both an inpatient admission
and an ED visit/observation stay during the performance period are counted towards the inpatient admission
outcome. Among those with no qualifying inpatient admissions, qualifying ED visits will be counted. As a
result, the rates can be viewed as an additive to provide a comprehensive performance estimate of quality of
care following hospital-based outpatient chemotherapy treatment. The rates are calculated separately because
the severity and cost of an inpatient admission is different from that of an ED visit and observation stay, and
both adverse events are important signals of quality and represent important healthcare outcomes for
patients. The Internal Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) codes
that identify these diagnoses are in the data dictionary available on the Chemotherapy Measure Methodology
QualityNet page: https://qualitynet.cms.gov/outpatient/measures/chemotherapy/methodology.
[

]

Denominator Statement:
The chemotherapy measure cohort includes Medicare fee-for-service (FFS) patients, aged 18 years and older
at the start of the performance period, with a diagnosis of any cancer (except leukemia), who received at
least one outpatient chemotherapy treatment at the reporting hospital during the performance period.
ICD-10, Current Procedural Terminology (CPT®), Healthcare Common Procedure Coding System and
revenue center codes that identify chemotherapy treatment are in the measure data dictionary on the
Chemotherapy Measure Methodology QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/chemotherapy/methodology.
Cohort Exclusions:
See the Measure Updated and Specifications Report available on the Chemotherapy Measure Methodology
QualityNet page for detailed measure cohort exclusion criteria:
https://qualitynet.cms.gov/outpatient/measures/chemotherapy/methodology.
Risk Adjustment:
Since the measure has two mutually exclusive outcomes—qualifying inpatient admissions and qualifying ED
visits—it has two risk-adjustment models, one for each dependent variable (inpatient admissions and ED
visits/observation stays). A two-level hierarchical logistic regression model is used to estimate riskstandardized outcome rates. This approach accounts for differences in patient mix, the clustering of patients
within hospitals, and variation in sample size.
The measure adjusts for variables that are clinically relevant and associated with the outcome. It seeks to adjust
for differences in patient demographics, clinical comorbidities, and treatment exposure which vary across
patient populations and influence the outcome but do not relate to quality. Specifically, the risk-standardized
model for inpatient admissions has 25 patient-level variables (age, sex, exposure to chemotherapy, exposure to
concurrent radiotherapy, nine comorbidity variables, and 12 cancer diagnosis categories). The riskstandardized model for ED visits has 20 patient-level variables (age, sex, exposure to chemotherapy, exposure
to concurrent radiotherapy, six comorbidity variables, and 10 cancer diagnosis categories).

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The comorbidities are based on version 24 of the CMS Condition Categories groups. Full Details of the
development of the risk-standardization model for this measure are available on the Chemotherapy Measure
Archived Resources QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/chemotherapy/resources#tab2 .
[

]

[

]

Table 1: Patient-Level Risk-Adjustment Variable
Category
Inpatient Admission Outcome
Demographics Age (years above 18, continuous)
Sex
Exposure
Number of hospital outpatient
chemotherapy treatments during the
performance period
Whether the patient received concurrent
radiotherapy
Cancer type
Anal cancer
Bladder cancer
Breast cancer
Digestive cancer
Respiratory cancer
Lymphoma
Other cancer
Ovarian cancer
Pancreatic cancer
Prostate cancer
Secondary cancer of the lymph nodes
Secondary cancer of solid tumor
Comorbidities Respiratory disorder
Renal disease
Diabetes
Other injuries
Metabolic disorder
Gastrointestinal disorder
Psychiatric disorder
Neurological condition
Cardiovascular disease

ED Visit Outcome
Age (years above 18, continuous)
Sex
Number of hospital outpatient
chemotherapy treatments during the
performance period
Whether the patient received concurrent
radiotherapy
Anal cancer
Bladder cancer
Breast cancer
Digestive cancer
Respiratory cancer
Other cancer
Ovarian cancer
Pancreatic cancer
Secondary cancer of the lymph nodes
Secondary cancer of solid tumor

Respiratory disorder
Other injuries
Gastrointestinal disorder
Psychiatric disorder
Neurological condition
Cardiovascular disease

Data Collection Approach: Medicare administrative claims and enrollment data.
Data Accuracy: The administrative claims data used to calculate the measure are maintained by CMS’
Office of Information Services. These data undergo additional quality assurance checks during measure
development and maintenance.
Measure Analysis Suggestions: None
Sampling: No
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Data Reported As: Facility-level, risk-standardized rate of inpatient admissions and ED visits for cancer
patients within 30 days of hospital-based outpatient chemotherapy treatment.
Measure Calculation:
The measure calculates a hospital-specific risk-adjusted rate for each of the two outcomes. Each rate is
calculated as the ratio of a hospital’s “predicted” number of outcomes to “expected” number of outcomes
multiplied by the national observed outcome rate. It estimates the expected number of outcomes for each
hospital using the hospital’s patient case mix and the average hospital-specific intercept (that is, the average
intercept among all hospitals in the sample). The measure estimates the predicted number of outcomes for
each hospital using the same patient case mix, but an estimated hospital-specific intercept. Operationally, the
measure obtains the expected number of outcomes for each hospital by summing the expected probabilities
of outcomes for all patients treated at the hospital. It calculates the expected probability of outcomes for each
patient via the hierarchical model, which applies the estimated regression coefficients to the observed patient
characteristics and adds the average of the hospital-specific intercept. It calculates the predicted number of
outcomes for each hospital by summing the predicted probabilities for all patients in the hospital. The
measure calculates the predicted probability for each patient through the hierarchical model, which applies
the estimated regression coefficients to the observed patient characteristics and adds the hospital-specific
intercept. If there were no differences among facilities, the facility-specific intercepts would be identical
across all facilities after adjusting for patient risk.
If a hospital’s ratio of predicted to expected outcomes are less than one, it indicates that the hospital is
performing better than expected given its case mix. If a hospital’s ratio of predicted to expected outcomes is
greater than one, it indicates that the hospital is performing worse than expected given its case mix. For ease
of interpretation, we transform this ratio to a rate by multiplying by the national observed rate for that
outcome. If the “predicted” number of outcomes is higher (or lower) than the “expected” number of
outcomes for a given hospital, the risk-adjusted rate will be higher (or lower) than the national observed
admission rate.
The statistical modeling approach is fully described in the Measure Updates and Specifications Report
available on the Chemotherapy Measure Methodology QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/chemotherapy/methodology.

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Centers for Medicare & Medicaid Services (CMS)
Hospital Visits after Hospital Outpatient Surgery Measure
Introduction
This section of the manual includes the Measure Information Form (MIF) for the CMS Hospital Visits after
Hospital Outpatient Surgery measure. This is an administrative claims-based measure, so there is no data
abstraction responsibility on the part of the facility. The measure includes Medicare Fee-for-Service (FFS)
patients, aged 65 and older, who received a qualifying same-day surgery at hospital outpatient departments
(HOPDs) during the performance period.
CMS will use the measure results in the Hospital Outpatient Quality Reporting (OQR) Program for payment
determination in calendar year 2026.
This measure was developed by a team of clinical and statistical experts from the Yale New Haven Health
Services Corporation/Center for Outcomes Research and Evaluation (YNHHSC/CORE), under contract to
CMS. The measure is currently consensus-based entity (CBE) endorsed (CMS Measures Information Tool
[CMIT] program specific identifier 00344-01-C-HOQR).1
[

]

The aim of the MIF is to be transparent about the measure methodology for the facility and vendor
communities. Additional background information about the measure methodology can be found in the
Measure Updates and Specifications Report available on the Surgery Measure Methodology QualityNet
page: https://qualitynet.cms.gov/outpatient/measures/surgery/methodology.
CMS provides a new report each year. For example, the 2018 Measure Updates and Specification Report
aligned with a performance period of calendar year 2018. If the re-evaluation report associated with the
performance period of this MIF is not yet available, it is sufficient to use the most recent report. Please
submit questions about the measure to the QualityNet Question and Answer Tool here:
https://cmsqualitysupport.servicenowservices.com/qnet_qa.
CMS calculates a facility-level risk-standardized unplanned hospital visit ratio for all eligible facilities.
Facilities and their ORYX® Vendors do not have sufficient data to produce facilities’ risk-standardized
results. CMS inpatient and outpatient claims data are used to determine whether a beneficiary has had an
unplanned hospital visit to any acute care hospital within seven days of the outpatient surgery. In addition,
CMS extracts and utilizes physician office, inpatient, and outpatient claims data from the year prior to the
surgery as well as claims data from the surgery to risk adjust the facility-level results.

1
[

CMIT refers to the CMS Measures Inventory Tool available at: https://cmit.cms.gov/cmit/#

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Measure Information Form
Performance Measure Name: Hospital Visits after Hospital Outpatient Surgery
Measure ID #: OP-36
Measure Set: CMS Outcome Measures (Claims-Based)
Description: Facility-level, post-surgical risk-standardized hospital visit ratio (RSHVR) of the predicted to
expected number of all-cause, unplanned hospital visits within seven days of a same-day surgery at a hospital
outpatient department among Medicare Fee-for-Service (FFS) patients aged 65 years and older.
Rationale: Outpatient same-day surgery is exceedingly common in the United States. Unanticipated hospital
visits following same-day surgery reflect quality of care. While most outpatient surgery is safe, there are
well-described and potentially preventable adverse events that occur after outpatient surgery, which can
result in unanticipated hospital visits. Similarly, direct admissions after surgery that are primarily caused by
non-clinical patient considerations, such as lack of transport home upon discharge, or facility logistical
issues, such as delayed start of surgery, are common causes of unanticipated yet preventable hospital
admissions following same-day surgery. A quality measure of hospital visits following outpatient same-day
surgery can improve transparency, inform patients and providers, and foster quality improvement.
Type of Measure: Outcome
Improvement Noted As: A decrease in the ratio of predicted-to-expected unplanned hospital visits.
Lower score indicates better quality.
Numerator Statement:
The outcome is all-cause unplanned hospital visits, defined as 1) an inpatient admission directly following
surgery or 2) an emergency department (ED) visit, observation stay, or unplanned inpatient admission
occurring after discharge from the HOPD and within seven days of the outpatient surgery.
Denominator Statement:
Eligible same-day surgeries or cystoscopy procedures with intervention performed at HOPDs for Medicare
FFS patients aged 65 years and older, with the exception of eye surgeries and same-day surgeries performed
concurrently with high-risk procedures.
Included Populations:
The target population is Medicare FFS patients aged 65 years and older undergoing same-day surgery (those
that do not typically require an overnight stay) at HOPDs. The measure is limited to patients who have been
enrolled in Medicare Part A and Part B up to the 12 months prior to the date of surgery to ensure the
availability of data for identifying comorbidities for risk adjustment.
The measure includes surgeries for which a physician claim identifies a qualifying surgery as having been
performed in an outpatient setting and matches to a hospital facility claim to identify the HOPD where the
surgery took place. For further information see the Cohort section of the Measure Updates and Specifications
report available on the Surgery Measure Methodology QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/surgery/methodology. Surgeries for which a facility claim is
not filed are not included in the measure cohort.
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“Same-day surgeries” are substantive surgeries listed on Medicare’s list of covered ambulatory surgery
center (ASC) procedures. Medicare developed this list to identify surgeries that can be safely performed as
same-day surgeries and do not typically require an overnight stay. Surgeries on the Medicare’s list of
covered ASC procedures do not involve or require major or prolonged invasion of body cavities, extensive
blood loss, major blood vessels, or care that is either emergent or life-threatening. Although Medicare
developed this list of surgeries for ASCs, this measure uses it for two reasons. First, it aligns with the target
cohort of surgeries that have a low to moderate risk profile and are safe to be performed as same day
surgeries. By only including surgeries on this list, the measure effectively does not include surgeries
performed at hospitals that typically require an overnight stay which are more complex, higher risk surgeries.
Second, this list of surgeries is annually reviewed and updated by Medicare and includes a transparent public
comment submission and review process for addition and/or removal of procedures codes. The lists are
posted at: https://www.cms.gov/Medicare/Medicare-Fee-for-ServicePayment/ASCPayment/11_Addenda_Updates.html (refer to Addendum AA of the respective link).
The measure cohort does not include eye surgeries. Although eye surgery is considered a substantive
surgery, its risk profile is more representative of “minor” surgery, in that it is characterized by high volume
and a low outcome.
The measure includes cystoscopy procedures with intervention because it is a common procedure, often
performed for therapeutic intervention by surgical teams, and the outcome rate and causes of hospital visits
post-procedure similar to other surgeries in the measure cohort.
Where multiple procedures occur concurrently, the measure only includes surgeries that are performed
concurrently with another low to moderate risk procedure. The measure does not include same-day surgeries
performed concurrently with a higher risk procedure such as an inpatient-only surgery.
For further details on the included surgeries and measure cohort, see the Measure Updates and Specifications
Report available on the Surgery Measure Methodology QualityNet page:
https://qualitynet.cms.gov/outpatient/measures/surgery/methodology.
Cohort Exclusions:
See the latest Measure Updates and Specifications Report available on the Surgery Measure Methodology
QualityNet page for detailed measure cohort exclusion criteria:
https://qualitynet.cms.gov/outpatient/measures/surgery/methodology.
Admissions Not Counted in the Outcome (“Planned Admissions”):
Admissions identified as planned by the planned admission algorithm are not counted in the outcome. The
“algorithm” is a set of criteria for classifying admissions as planned using Medicare claims. The algorithm
identifies admissions that are typically planned and may occur within seven days of an outpatient surgery.
CMS based the planned admission algorithm on three principles:
1. A few specific, limited types of care are always considered planned (transplant surgery, maintenance
chemotherapy, rehabilitation);
2. Otherwise, a planned admission is defined as a non-acute admission for a scheduled procedure; and
3. Admissions for acute illness or for complications of care are never planned.

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The planned admission algorithm uses a flowchart and four tables of procedures and conditions to
operationalize these principles and to classify inpatient admissions as planned. The measure considers
admissions occurring on the day of the surgery (Day 0) and Day 1 post-surgery unplanned. For inpatient
admissions occurring after Day 1 following surgery, the measure only includes unplanned admissions in the
measure outcome.
ED visits and observation stays are never considered planned. The flowchart and tables are available in the
latest Measure Updates and Specifications Report:
https://qualitynet.cms.gov/outpatient/measures/surgery/methodology.
Risk Adjustment:
The measure approach to risk adjustment is tailored to, and appropriate for, a publicly reported outcome
measure as articulated in published scientific guidelines.1,2
The measure uses a two-level hierarchical logistic regression model to estimate RSHVRs. This approach
accounts for the clustering of patients within HOPDs and variation in sample size.
The risk-adjustment model has 27 patient-level variables, including age, clinical comorbidities, and
indicators of surgical complexity.
The measure defines comorbidity variables using CMS Condition Categories (CCs), which are clinically
meaningful groupings of many thousands of ICD-10-CM diagnosis codes. Certain CCs are considered
possible complications of care and are not risk-adjusted for if they only occur at the surgery. See the data
dictionary available on the Surgery Measure Methodology QualityNet page
https://qualitynet.cms.gov/outpatient/measures/surgery/methodology for CCs that are considered possible
complications of care and are not risk-adjusted for if they only occur at the surgery.
The measure risk adjusts for surgical procedural complexity using two variables. First, it adjusts for surgical
procedural complexity using the Work Relative Value Unit (RVU) of the procedure. Work RVUs are
assigned to each Current Procedural Terminology (CPT) code and approximate surgical procedural
complexity by incorporating elements of physician time and effort. For patients with multiple concurrent
CPT procedure codes, the measure risk adjusts for the CPT code with the highest Work RVU value. Second,
it classifies each surgery into an anatomical body system group using the Agency for Healthcare Research
and Quality (AHRQ) Clinical Classification System (CCS).3 The measure uses the body system variable, in
addition to the Work RVU of the surgery, to account for organ-specific difference in risk and complications
which are not adequately captured by the Work RVU alone. This approach to risk adjustment for surgical
procedural complexity is similar to that described in the literature and used for risk adjustment in the
American College of Surgeons’ National Surgical Quality Improvement Program.4 The coding list for the
body systems is available at: https://www.hcup-us.ahrq.gov/tools_software.jsp.

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Table 1: Patient-Level Risk-Adjustment Variables
Patient-Level Variables
Demographics

Comorbidities

Procedural Complexity

Risk-Adjusted Variables
Age (years greater than 65)
Cancer
Diabetes and DM complications
Disorders of fluid/electrolyte/acid-base
Intestinal obstruction perforation
Inflammatory bowel disease
Bone/joint/muscle infections/necrosis
Hematological disorders including coagulation defects and iron deficiency
Dementia or senility
Psychiatric disorders
Hemiplegia, paraplegia, paralysis, functional disability
Other significant CNS disease
Cardiorespiratory arrest, failure and respiratory dependence
Congestive heart failure
Ischemic heart disease
Hypertension and hypertensive disease
Arrhythmias
Vascular disease
Chronic lung disease
UTI and other urinary tract disorders
Pelvic inflammatory disease and other specified female genital disorders
Chronic ulcers
Cellulitis, local skin infection
Prior significant fracture
Morbid obesity
Work RVU
AHRQ surgery body system

For a detailed description of the development and refinement of the risk-adjustment model, see the latest
Hospital Visits after Hospital Outpatient Surgery: Measure Updates and Specifications Report:
https://qualitynet.cms.gov/outpatient/measures/surgery/methodology.
Data Collection Approach: Medicare administrative claims and enrollment data.
Data Accuracy: The administrative claims data used to calculate the measure are maintained by CMS’
Office of Information Services. These data undergo additional quality assurance checks during measure
development and maintenance.
Measure Analysis Suggestions: None
Sampling: No
Data Reported As: Facility-level seven-day risk-standardized unplanned hospital visit ratio following
outpatient surgery.
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Measure Calculation:
To calculate a facility-specific, post-surgical RSHVR for outpatient surgery patients, the measure uses
hierarchical logistic regression to model the log-odds of the outcome as a function of the patient
demographic and clinical characteristics, surgical procedure, and a random facility-specific intercept. This
strategy accounts for within-facility correlation of the observed outcome, and it accommodates the
assumption that underlying differences in quality across HOPDs lead to systematic difference in outcomes.
For fairness, the model adjusts for demographic and clinical characteristics and procedural variables that
vary across patient populations, are unrelated to quality, and influence the outcome to help ensure differences
in the measure score do not reflect differences in case mix and surgical procedure mix across HOPDs. If
there were no differences among facilities, the facility-specific intercepts would be identical across all
facilities after adjusting for patient risk. The statistical approach to calculating RSHVR is described in
Appendix D of the 2016 Measure Updates and Specifications Report:
https://qualitynet.cms.gov/files/5d0d3a7e764be766b0104644?filename=2016HOPDSurgeryTechReport.pdf.
Selected References:
1. Krumholz HM, Brindis RG, Brush JE, et al. Standards for Statistical Models Used for Public Reporting
of Health Outcomes: An American Heart Association Scientific Statement From the Quality of Care
and Outcomes Research Interdisciplinary Writing Group: Cosponsored by the Council on
Epidemiology and Prevention and the Stroke Council Endorsed by the American College of Cardiology
Foundation. Circulation. 2006; 113 (3): 456-462.
2. Normand S-LT, Shahian DM. Statistical and Clinical Aspects of Hospital Outcomes Profiling.
Statistical Science. 2007; 22 (2): 206-226.
3. HCUP Clinical Classifications Software for Services and Procedures. Healthcare Cost and Utilization
Project (HCUP). 2008. Agency for Healthcare Research and Quality, Rockville, MD http://www.hcupus.ahrq.gov/toolssoftware/ccs_svcsproc/ccssvcproc.jsp, 2014.
4. Raval MV, Cohen ME, Ingraham AM, et al. Improving American College of Surgeons National
Surgical Quality Improvement Program risk adjustment: incorporation of a novel procedure risk score.
Journal of the American College of Surgeons. Dec 2010; 211(6): 715-723.

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Data Dictionary
Introduction:
This section of the manual describes the data elements required to calculate category assignments and
measurements for the hospital outpatient measures. It includes information necessary for defining and
formatting the data elements, as well as the allowable values for each data element. This information is
intended to assist in processing patient-level data elements for hospital outpatient measures.
It is of primary importance that all hospitals using hospital outpatient measures gather and utilize the
data elements as defined in this section. This will ensure that the data are standardized and comparable
across hospitals.
Regardless of which measures are selected by a hospital, certain general data elements must be collected and
submitted for every patient that falls into any of the selected outpatient populations. These data elements are
considered “general” to each outpatient encounter.
These data elements include:
• Arrival Time
• Birthdate
• CMS Certification Number ‡, †
• Hispanic Ethnicity
• Outpatient Encounter Date
• Patient Identifier
• Payment Source
• Postal Code
• Race
• Sex
‡ Transmission Data Element.

† Defined in the Transmission Data Element List within the Hospital Outpatient Quality Measure Data Transmission section of this manual.
ǂ Collected by CMS for patients with a Payment Source of Medicare who have a standard HIC number

Interpretation of Data Dictionary Terms:
Data elements fall into three broad categories in order to support specific measures. They include:
• General Data Elements – Data elements that must be collected by hospitals for each patient record.
o Data elements required for each hospital outpatient encounter record submitted.
o Data elements used to identify the hospital on each patient record required for each patient-level
record submitted.
o Patient demographic data required for each hospital outpatient encounter record submitted.
• Measure-Specific Data Elements – Data elements used by one specific measure or outpatient measure
set, such as the ED-Throughput outpatient measure set.
• Optional Data Elements – Data elements collected to capture information that might be helpful for
internal analysis.

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Data Dictionary Terms
Data Element Name:

A short phrase identifying the data element.

Collected For:

Identifies the measure(s) that utilize this data element or specifies that the data
element is used for data transmission or verification.

Definition:

A detailed explanation of the data element.

Suggested Data
Collection Question:

A suggested wording for a data element question in a data abstraction tool.

Format:

Length = number of characters or digits allowed for the data element
Type = type of information the data element contains (i.e., numeric,
alphanumeric, date, decimal, or time)
Occurs = the number of times the data element occurs in a single
encounter record

Allowable Values:

A list of acceptable responses for this data element.

Notes for Abstraction:

Provided to assist abstractors in the selection of an appropriate value
for a data element.

Suggested Data Sources:

Source document from which data can be identified such as an administrative
or medical record. Some data elements also list excluded data sources that are
unacceptable sources for collecting information.

Guidelines for Abstraction: Designed to assist abstractors in determining how a data element should
be answered.

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General Abstraction Guidelines
The General Abstraction Guidelines are a resource designed to assist abstractors in determining how an
abstraction question should be answered. The abstractor should first refer to the specific notes and guidelines
under each data element as these instructions should take precedence over the following General Abstraction
Guidelines. All the allowable values for a given data element are outlined, and notes and guidelines are often
included in each data element’s notes and guidelines which provide the necessary direction for abstracting a
data element. Thus, it is important to utilize the information found in the notes and guidelines when entering
or selecting the most appropriate answer.
Abstractors should not make inferences from documentation of a sequence of events alone or otherwise
attempt to interpret from documentation. Clinical judgment should not be used in abstraction.
Medical Records
The hospital must have one unified medical record service that has administrative responsibility for all
medical records, both inpatient and outpatient records. The hospital must create and maintain a medical
record for every individual, both inpatient and outpatient evaluated or treated in the hospital. The term
“medical records” includes at least written documents, computerized electronic information, radiology film
and scans, laboratory reports and pathology slides, videos, audio recordings, and other forms of information
regarding the condition of a patient (42CFR482.24). The medical record must contain information to justify
admission and continued hospitalization, support the diagnosis, and describe the patient’s progress and
response to medications and services [42CFR428.24(c)].
Medical Record Documentation
The intent of abstraction is to use only documentation that was part of the medical record during the
hospitalization (is present upon discharge) and that is present at the time of abstraction. There are
instances where an addendum or late entry is added after discharge. This late entry or addendum can
be used for abstraction purposes as long as it has been added within 30 days of discharge. Refer to the
Medicare Conditions of Participation for Medical Records, 42CFR482.24(c)(4)(viii), unless otherwise
specified in the data element. Documents containing amendments, corrections, or delayed entries must
employ the following widely accepted recordkeeping principles (CMS “Medicare Program Integrity
Manual” Chapter 3, Section 3.3.2.4):
• Clearly and permanently identify any amendments, corrections, or addenda;
• Clearly indicate the date and author of any amendments, corrections, or addenda; and
• Clearly identify all original content.
It is not the intent to have documentation added at the time of abstraction to ensure the passing of a measure.
Important Note: Data element specific notes and guidelines always take precedence over the General
Abstraction Guidelines.
Per the Medicare Conditions of Participation, all documentation in the medical record must be legible and
must be timed, dated, and authenticated [42CFR482.24(c) (1)]. However, documentation that is not timed,
dated, or authenticated may still be used for abstraction if not required by the specific data element. When
abstracting a medical record, if a handwritten document is determined to be not legible, other documentation
should be reviewed in an attempt to obtain the answer. If no other source document is able to verify the
handwritten documentation, only then is the abstractor to answer unable to determine from the medical
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record documentation, unless otherwise specified in the data element. Authentication may include written
signatures, initials, computer key, or other codes.
Data element information should be retrieved from the current medical record, covering the encounter date
being abstracted. Information ascertainable from previous testing or previous history and determined to be
part of the current medical record may be used in abstraction. Previous testing or history information used in
abstraction should be information that was part of the medical record during the encounter when care was
being delivered. As electronic data are available at all times during the hospitalization, it is acceptable to use
these data for abstraction purposes. If a hospital uses electronic data for abstraction and is unable to provide a
paper or electronic copy of these data, and the record is chosen for validation, there is the potential for a
mismatch to occur.
The medical record must be abstracted as documented (i.e., taken at “face value”). When the value
documented is obviously in error (not a valid format/range or outside of the parameters for the data element)
and no other documentation is found that provides this information, the abstractor should select “UTD.”
Note:
• Hospitals should use abbreviations according to their policy. Frequently flow sheets or other
documentation contain a “key” or “legend” that explains the meaning of the abbreviation or symbol,
especially if it is unique to that facility. If the record is selected for validation, it is recommended that you
include your policy, key, and/or legend if you believe it would have an impact on the validation of the
medical record.
• Documentation that is “superscripted” or footnoted is allowable and can be used in abstraction.
Suggested Data Sources
• Suggested Data Sources are listed in alphabetical order, not priority order, unless otherwise specified.
Suggested Data Sources are designed to provide guidance to the abstractor as to the locations/sources
where the information needed to abstract a data element will likely be found. However, the abstractor is
not limited to these sources for abstracting the information and is encouraged to review the entire
medical record.
• In some instances, a data element may restrict the sources that may be used to gain the information, list a
priority in which the sources should be used, or may restrict documentation by only physician/advanced
practice nurse/physician assistant. If so, these sources will be identified and labeled as Excluded Data
Sources, Only Acceptable Sources, Priority Source, or Physician/APN/PA Documentation Only.
• In the course of abstraction, if conflicting information is found in a source other than the Suggested Data
Sources and use of this source is not restricted, consider using this information if it more accurately
answers the question, unless otherwise specified.
• If, after due diligence, the abstractor determines that a value is not documented, or the abstractor is not
able to determine the answer value, the abstractor must select UTD as the answer.
• Hospitals often label forms and reports with unique names or titles. Suggested Data Sources are listed by
commonly used titles; however, information may be abstracted from any source that is equivalent to
those listed.
Inclusions/Exclusions
• Inclusions are acceptable terms that should be abstracted as positive findings (e.g., Yes).

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•
•
•
•

Inclusion lists are limited to those terms that are believed to be most commonly used in medical record
documentation. The list of inclusions should not be considered all-inclusive, unless otherwise specified
in the data element.
Exclusions are unacceptable terms that should be abstracted as negative findings (e.g., No).
Exclusion lists are limited to those terms an abstractor may most frequently question whether or not to
abstract as a positive finding for a particular element. The list of exclusions should not be considered
all-inclusive, unless otherwise specified in the data element.
When both an inclusion and exclusion are documented in a medical record, the inclusion takes
precedence over the exclusion and would be abstracted as a positive finding (e.g., answer Yes), unless
otherwise specified.

Physician/Advanced Practice Nurse/Physician Assistant Documentation
• Advanced Practice Nurse (APN, APRN) titles may vary between state and clinical specialties. Some
common titles that represent the advanced practice nurse role are:
o Nurse Practitioner (NP)
o Certified Registered Nurse Anesthetist (CRNA)
o Clinical Nurse Specialist (CNS)
o Certified Nurse Midwife (CNM)
• When a physician/advanced practice nurse/physician assistant (physician/APN/PA) signs a form or
report (e.g., ED sheet with triage and nursing information and a physician/APN/PA has signed
somewhere on the form), information on that form/report should be considered physician/APN/PA
documentation. Rubber-stamped physician/APN/PA signatures are not acceptable on any document
within the medical record. Handwritten, electronic signatures, or facsimiles of original written or
electronic signatures are acceptable.
• Resident and intern notes should be considered physician documentation. Medical student notes must be
co-signed by a physician.
• For purposes of abstraction, telephone or verbal physician/APN/PA orders (TO/VO) in the medical
record are considered physician/APN/PA documentation at the time they were written, regardless of
whether or not they were authenticated by the physician/APN/PA at the time of abstraction.
• “Scribe” documentation is acceptable as long as the documentation is signed by the treating
physician/APN/PA (CMS “Medicare Program Integrity Manual” Chapter 3, Section 3.3.2.4).
Pharmacist Documentation
Pharmacist titles may vary. The following are some common titles that represent the pharmacist role:
• Doctor of Pharmacy (Pharm.D. or D.Ph.)
• Registered Pharmacist (R.Ph.)
Medications
• The approved medication tables contained in Appendix C may not be inclusive lists of all available
therapeutic agents acceptable for a particular data element. Discrepancies must be reported.
• For electronic health records (EHRs) only accept documentation that reflects the actual administration of
the medication in the context of the chart.
• If a medication in the physician orders has been initialed and signed off with a time, do not presume
that the medication was administered. The documentation must indicate that the medication was
actually given.

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•

For an EMT or ambulance record, there is no need for documentation indicating that the medication was
actually given.
o Example: If the EMT or ambulance record reflects “ASA 325mg po 1300” and no other
documentation exists indicating that the medication was actually given (e.g., “given” or
“administered”), this is acceptable documentation to abstract.

•

Hospitals may allow a patient (or his or her caregiver/support person where appropriate) to selfadminister both hospital-issued medications and the patient’s own medications brought into the hospital.
Hospitals must document the administration of each medication, as reported by the patient (or the
patient’s caregiver/support person where appropriate) in the patient’s medical record
[42CFR482.23(c)(6)].

Nursing Care Plans, Standing Orders, and Protocols
• Per Medicare Conditions of Participation [42CFR482.23(b)(4)], hospitals have the option of having
a stand-alone nursing care plan or a single interdisciplinary care plan that addresses nursing and
other disciplines.
• Hospitals may use pre-printed and electronic standing orders, order sets, and protocols for patient orders
if such orders and protocols are dated, timed, and authenticated promptly in the patient’s medical record
by the ordering practitioner responsible for the care of the patient [42CFR482.24(c)(3)].
Abstraction Recommendations for Multiple Same-Day Encounters
• If two ED visits on the same day are rolled into one claim, abstract the first chronological encounter
that meets the inclusion criteria for the population.
• If two ED visits on the same encounter date meet the inclusion criteria and are billed as two separate
claims, both cases may be eligible for abstraction according to sampling requirements. Because the
data element Arrival Time is used to differentiate between two cases that occur on the same encounter
date, if both cases are submitted with UTD for Arrival Time, the case submitted last will override the
previous case.
Electronic Clinical Quality Measures (eCQM)
• Refer to the Technical Specifications and Resources for the CMS Quality Reporting Document
Architecture (QRDA) Category I Implementation Guide for the applicable reporting period, measure
specification information including data elements, and program resources to support successful eCQM
reporting on the eCQI Resource Center.
• For questions regarding eCQM specifications, value sets, and appropriateness of mapping, please submit
questions to the Office of the National Coordinator for Health Information Technology (ONC) eCQM
Issue Tracker at https://oncprojectracking.healthit.gov/support/projects/CQM/summary. The eCQM Issue
Tracker is an online database that allows for the submission and retrieval of questions and answers based
on the measure and keyword criterion.
[

]

[

]

[

]

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Alphabetical Data Element List
Element Name
Arrival Time
Birthdate
Date Last Known Well
Discharge Code
E/M Code
ED Departure Date
ED Departure Time
First Name
Head CT or MRI Scan Interpretation Date
Head CT or MRI Scan Interpretation Time
Head CT or MRI Scan Order
Hispanic Ethnicity
ICD-10-CM Principal Diagnosis Code
Last Known Well
Last Name
Outpatient Encounter Date
Patient Identifier
Payment Source
Physician 1
Physician 2
Postal Code
Race
Sex
Time Last Known Well

Page #
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2-11
2-12
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2-20
2-23
2-24
2-26
2-29
2-31
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2-33
2-35
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Collected For:
All Records
All Records
OP-23
OP-18, OP-23
OP-18, OP-23
OP-18
OP-18
All Records
OP-23
OP-23
OP-23
All Records
OP-18, OP-23
OP-23
All Records
All Records
All Records
All Records
Optional for All Records
Optional for All Records
All Records
All Records
All Records
OP-23

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Data Element Name: Arrival Time
Collected For: All records (used in algorithms for OP-18, OP-23)
Definition: The earliest documented time (military time) the patient arrived at the outpatient or
emergency department.
Suggested Data Collection Question: What was the earliest documented time the patient arrived
at the outpatient or emergency department?
Format:
Length:

5 – HH:MM (with or without colon) or UTD

Type:

Time

Occurs:

1

Allowable Values:
HH

= Hour (00–23)

MM

= Minutes (0–59)

UTD

= Unable to Determine

Time must be recorded in military time format.
With the exception of midnight and noon:
• If the time is in the a.m., conversion is not required.
• If the time is in the p.m., add 12 to the clock time hour.
Examples:
o Midnight = 0000 Noon = 1200
o 5:31 a.m. = 0531 5:31 p.m. = 1731
o 11:59 a.m. = 1159 11:59 p.m. = 2359
Note: 0000 = midnight. If the time is documented as 0000 11-24-20XX, review supporting documentation
to determine if the Outpatient Encounter Date should remain 11-24-20XX or if it should be converted
to 11-25-20XX.
When converting midnight, or 2400, to 0000, do not forget to change the Outpatient Encounter Date.
Example:
o Midnight or 2400 on 11-24-20XX = 0000 on 11-25-20XX.
Notes for Abstraction:
• For times that include seconds, remove the seconds and record the time as is.
Example:
o 1500:35 would be recorded as 1500
• If the time of the arrival is unable to be determined from medical record documentation, select UTD.
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•

•
•

•

•
•
•

The medical record must be abstracted as documented (taken at “face value”). When the time
documented is obviously in error (not a valid time) and no other documentation is found that provides
this information, the abstractor should select UTD.
Example:
o Documentation indicates the arrival time was 3300. No other documentation in the list of Only
Acceptable Sources provides a valid time. Since the Arrival Time is outside of the range in the
Allowable Values for Hour, it is not a valid time, and the abstractor should select UTD. Note:
Transmission of a case with an invalid time as described above will be rejected from the
CMS Clinical Data Warehouse. Use of UTD for Arrival Time allows the case to be accepted into
the Warehouse.
Review the Only Acceptable Sources to determine the earliest time the patient arrived at the ED or
observation. The intent is to utilize any documentation which reflects processes that occurred after the
arrival at the ED or after arrival to observation.
Documentation outside of the Only Acceptable Sources list should not be referenced (e.g., ambulance
record, physician office record, H&P).
Examples:
o ED Triage Time 0800. ED rhythm strip 0830. EMS report indicates patient was receiving EMS care
from 0805 through 0825. The EMS report is disregarded. Enter 0800 for Arrival Time.
o ED noted arrival time of 0945. Lab report shows blood culture collected at 0830. It is not clear that
the blood culture was collected in the ED because the lab report does not specify it was collected in
the ED (unable to confirm lab report as an Only Acceptable Source). Enter 0945 for Arrival Time.
Arrival Time should not be abstracted simply as the earliest time in one of the Only Acceptable Sources,
without regard to other substantiating documentation. When looking at the Only Acceptable Sources, if
the earliest time documented appears to be an obvious error, this time should not be abstracted.
Examples:
o ED arrival time notes as 2300 on 10-28-20xx. ED MAR shows an antibiotic administration time of
0100 on 10-28-20xx. Surrounding documentation on the ED MAR makes clear that the 10-28-20xx
date is an obvious error- Date was not changed to 10-29-20xx. The antibiotic administration
date/time would be converted to 0100 on 10-29-20xx. (Please see the note under the Allowable
Values section of this data element). Enter 2300 for Arrival Time.
o ED face sheet lists arrival time of 1320. ED Registration Time 1325. ED Triage Time 1330. ED
Consent to treat form has 1:17 time but “AM” is circled. ED record documentation suggests the 1:17
AM is an obvious error. Enter 1320 for Arrival Time.
o ED ECG timed as 1742. ED Greet Time 2125. ED Triage Time 2130. There is no documentation
in the Only Acceptable Sources which suggests the 1742 is an obvious error. Enter 1742 for
Arrival Time.
o ED RN documents on the nursing triage note, “Blood culture collected at 0730.” ED arrival time is
documented as 1030. There is no documentation in the Only Acceptable Sources which suggests the
0730 is an obvious error. Enter 0730 for Arrival Time.
The source “Emergency Department record” includes any documentation from the time period that the
patient was an ED patient.
The source “Procedure notes” refers to procedures such as cardiac caths, endoscopies, and surgical
procedures. Procedure notes do not include ECG and x-ray reports.
The Arrival Time may differ from the admission time.

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Observation Status:
• If the patient was admitted to observation from an outpatient setting of the hospital, use the time the
patient arrived at the ED or on the floor for observation care as the Arrival Time.
• If the patient was admitted to observation from the ED of the hospital, use the time the patient arrived at
the ED as the Arrival Time.
Suggested Data Sources:
Only Acceptable Sources:
• Emergency Department record, which may include:
o ED face sheet
o ED consent/Authorization for treatment forms
o ED/Outpatient registration/Sign-in forms
o ED ECG reports
o ED telemetry/rhythm strips
o ED laboratory reports
o ED x-ray reports
• Observation record
• Procedure notes
• Vital signs graphic record
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction:
• Addressographs/stamps
• Pre-printed times on a vital sign graphic record

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Data Element Name: Birthdate
Collected For: All records
Definition: The month, day, and year the patient was born.
Note: Patient Age on Outpatient Encounter Date (in years) is calculated by Outpatient Encounter Date
minus Birthdate. The algorithm to calculate age must use the month and day portion of encounter date and
birthdate to yield the most accurate age.
Suggested Data Collection Question: What is the patient’s date of birth?
Format:
Length: 10 – MM-DD-YYYY (includes dashes)
Type:
Date
Occurs: 1
Allowable Values:
MM
= Month (01–12)
DD
= Day (01–31)
YYYY = Year (1907–Current Year)
Notes for Abstraction:
Because this data element is critical in determining the population for all measures, the abstractor should not
assume that the claim information for the birthdate is correct. If the abstractor determines through chart
review that the date is incorrect, correct and override the downloaded value. If the abstractor is unable to
determine the correct birthdate through chart review, default to the date of birth on the claim information.
Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Date Last Known Well
Collected For: OP-23
Definition: The date prior to hospital arrival at which the patient was last known to be without the signs and
symptoms of the current stroke or at his or her baseline state of health.
Suggested Data Collection Question: What was the date associated with the time at which the patient was
last known to be well or at his or her baseline state of health?
Format:
Length: 10 – MM-DD-YYYY (includes dashes) or UTD
Type:
Date
Occurs: 1
Allowable Values:
MM
= Month (01-12)
DD
= Day (01-31)
YYYY = Year (20xx)
UTD
= Unable to Determine
Notes for Abstraction:
• Enter the date associated with the Time Last Known Well. If the Date Last Known Well is unable to be
determined from medical record documentation, enter UTD.
• The medical record must be abstracted as documented (taken at “face value”). When the date
documented is obviously in error (not a valid date/format) and no other documentation is found that
provides this information, the abstractor should select UTD.
Example:
o Documentation indicates the Date Last Known Well was 03-42-20xx. No other documentation in
the medical record provides a valid date. Since the Date Last Known Well is outside of the range
listed in the Allowable Values for Day, it is not a valid date, and the abstractor should select UTD.
Note: Transmission of case with an invalid date as described above will be rejected from the CMS
Clinical Data Warehouse. Use of UTD for Date Last Known Well allows the case to be accepted
into the Warehouse.
• If both the Date Last Known Well and symptom onset are documented, select the Date Last
Known Well.
Example:
o ED provider note states, “Patient watching TV with family and complained of blurred vision in
both eyes this morning.” Neuro provider note states, “Patient normal 12-10-20xx at 8:30 PM.” Date
Last Known Well is 12-10-20xx.
•

If the Date Last Known Well is documented as a specific date and entered as Date Last Known Well on a
Code Stroke Form or stroke-specific electronic template, enter that date as Date Last Known Well.
Documentation of the Date Last Known Well on a stroke-specific form or template should be selected
regardless of other dates last known well documented elsewhere in the medical record.
Exceptions:
o Any physician/APN/PA documentation that last known well/onset of signs/symptoms is
unknown/uncertain/unclear takes precedence over specific time on a Code Stroke Form.

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•

•

•
•

References in relation to arrival date are acceptable (e.g., today, tonight, this evening, or this morning).
The Date Last Known Well and the arrival date may be the same date or a different date.
Examples:
o “Wife reports patient normal this evening until approximately 9 PM.” Hospital arrival is 0030 on
12-10-20xx. Date Last Known Well is 12-09-20xx.
o “Patient states he felt perfectly fine earlier today. At noon, he began to have trouble seeing.”
Hospital arrival is 1559 on 12-10-20xx. Date Last Known Well is 12-10-20xx.
If a reference to date last known well is documented without a specific date, enter that date for Date Last
Known Well. If multiple dates are documented, select the earliest date.
Examples:
o “Patient last known well today (day of arrival).” Select arrival date for Date Last Known Well.
o “Patient normal yesterday” (day before arrival) documented in H&P and consult note documents
that patient was last known to be well on Monday (two days prior to arrival). Select Monday’s date
for Date Last Known Well.
A Code Stroke Form is used by the stroke team or ED staff to document the acute stroke process. See the
inclusion list for acceptable terms used for a Code Stroke Form. The list is not all-inclusive.
Date Last Known Well on a Code Stroke Form may be documented by a nurse or other member of the
care team authorized to serve as a scribe.

Suggested Data Sources:
• Ambulance record
• Code Stroke Form/template
• Emergency Department records
• History and Physical
• IV flow sheets
• Medication administration record
• Nursing flow sheets
• Progress notes
• Transfer sheet
Inclusion Guidelines for Abstraction:
Signs and Symptoms of Stroke
• Sudden numbness or weakness of the face, arm, or leg, especially on one side of the body
• Sudden confusion, trouble speaking or understanding
• Sudden trouble seeing in one or both eyes
• Sudden trouble walking, dizziness, loss of balance or coordination
• Sudden severe headache
• Syncope
• Seizure
Code Stroke Form
• Stroke Activation Form
• Stroke Alert Form
• Stroke Assessment Form
• Stroke Intervention Form
• Stroke Rapid Response Form
• Thrombolysis Checklist
• tPA Eligibility Form
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Exclusion Guidelines for Abstraction:
Code Stroke Form
• Stroke Education Form
• Core Measure Form

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Data Element Name: Discharge Code
Collected For: OP-18, OP-23
Definition: The final place or setting to which the patient was discharged from the outpatient setting.
Suggested Data Collection Question: What was the patient’s discharge code from the outpatient setting?
Format:
Length: 2
Type:
Alphanumeric
Occurs: 1
Allowable Values:
1
Home
2
Hospice – Home
3
Hospice – Health Care Facility
4a Acute Care Facility – General Inpatient Care
4b Acute Care Facility – Critical Access Hospital
4c Acute Care Facility – Cancer Hospital or Children’s Hospital
4d Acute Care Facility – Department of Defense or Veteran’s Administration
5
Other Health Care Facility
6
Expired
7
Left Against Medical Advice/AMA
8
Not Documented or Unable to Determine (UTD)
Notes for Abstraction:
• Use the latest documentation. However, if there is documentation that further clarifies the level of care,
that documentation should be used to determine the correct value to abstract, even if it is not the latest.
Example:
o Nursing discharge note documentation reflects that the patient is being discharged to “XYZ”
Hospital. The Social Service notes from the day before discharge further clarify that the patient will
be transferred to the rehab unit at “XYZ” Hospital; select Value 5.
• If the medical record states only that the patient is being discharged to another hospital and does not
reflect the level of care that the patient will be receiving, select Value 4a.
• When determining whether to select Value 7 (“Left Against Medical Advice”):]
o A signed AMA form is not required for this data element, but in the absence of a signed form, the
medical record must contain physician or nurse documentation that the patient left against medical
advice or AMA.
o Do not consider AMA documentation and other disposition documentation as “contradictory.” If any
source states the patient left against medical advice, select Value 7, regardless of whether the AMA
documentation was written last (e.g., AMA form signed and discharge instruction sheet states
“Discharged home with belongings”—Select Value 7).
o Physician order written to discharge to home. Nursing notes reflect that the patient left before
discharge instructions could be given; select Value 1.

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Suggested Data Sources:
• Discharge instruction sheet
• Nursing discharge notes
• Progress notes

• Emergency Department record
• Physician orders
• Transfer record

Excluded Data Sources:
• UB-04
Inclusion Guidelines for Abstraction:
For Value 1:
• Assisted Living Facilities
• Court/Law Enforcement – includes detention facilities, jails, and prison
• Home – includes board and care, foster or residential care, group or personal care homes,
and homeless shelters
• Home with Home Health Services
• Outpatient Services including outpatient procedures at another hospital, Outpatient Chemical
Dependency Programs, and Partial Hospitalization
For Value 3:
• Hospice Care – General Inpatient and Respite
• Hospice Care – Residential and Skilled Facilities
• Hospice Care – Other Health Care Facilities (excludes home)
For Value 5:
• Extended or Intermediate Care Facility (ECF/ICF)
• Long Term Acute Care Hospital (LTACH)
• Nursing Home or Facility, including Veteran’s Administration Nursing Facility
• Psychiatric Hospital or Psychiatric Unit of a Hospital
• Rehabilitation Facility, including Inpatient Rehabilitation Facility/Hospital or Rehabilitation
Unit of a Hospital
• Skilled Nursing Facility (SNF), Sub-Acute Care, or Swing Bed
• Transitional Care Unit (TCU)
Exclusion Guidelines for Abstraction: None

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Data Element Name: E/M Code
Collected For: OP-18, OP-23
Definition: The code used to report evaluation and management services provided in the emergency
department.
Suggested Data Collection Question: What was the E/M code documented for this
emergency department encounter?
Format:
Length: 5
Type:
Alphanumeric
Occurs: 1
Allowable Values:
• Select the E/M Code from Appendix A, OP Table 1.0.
Suggested Data Sources:
• Outpatient record
Inclusion Guidelines for Abstraction:
• Refer to Appendix A, OP Table 1.0, EM Codes for Emergency Department Encounters.
Exclusion Guidelines for Abstraction: None

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Data Element Name: ED Departure Date
Collected For: OP-18
Definition: The month, day, and year at which the patient departed from the emergency department.
Suggested Data Collection Question: What is the date the patient departed from the emergency
department?
Format:
Length: 10 – MM-DD-YYYY (includes dashes) or UTD
Type:
Date
Occurs: 1
Allowable Values:
MM
= Month (01-12)
DD
= Day (01-31)
YYYY = Year (20xx)
UTD
= Unable to Determine
Notes for Abstraction:
• The medical record must be abstracted as documented (taken at “face value”). When the date
documented is obviously in error (not a valid format/range or outside of the parameters of care and no
other documentation is found that provides this information), the abstractor should select UTD.
Examples:
o Documentation indicates the ED departure date was 03-42-20xx. No other documentation
in the list of Only Acceptable Sources provides a valid date. Since the ED Departure Date is
outside of the range listed in the Allowable Values for Day, it is not a valid date, and the abstractor
should select UTD.
o Patient expired on 02-12-20xx, and all documentation within the Only Acceptable Sources
indicates the ED Departure Date was 03-12-20xx. Other documentation in the medical record
supports the date of death as being accurate. Since the ED Departure Date is after the Discharge
Date (death), it is outside of the parameter of care, and the abstractor should select UTD.
o Note: Transmission of a case with an invalid date as described above will be rejected from the
CMS Clinical Data Warehouse. Use of UTD for ED Departure Date allows the case to be accepted
into the warehouse.
• If the date the patient departed is unable to be determined from medical record documentation,
select UTD.
• If the date of departure is not documented but you are able to determine the date from other
documentation, this is acceptable (e.g., you are able to identify from documentation the patient arrived
and was transferred on the same day).
• If there is documentation the patient left against medical advice and it cannot be determined what date
the patient left against medical advice, select UTD.
• For patients who are placed into observation services, use the date of the physician/APN/PA order for
observation services as ED Departure Date.
• The inclusion and exclusion lists are not to be considered comprehensive lists of inclusions
and exclusions.
• If there is a discharge date listed on a disposition sheet, this may be abstracted as ED Departure Date.
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Obstetric ED considerations:
• For patients who arrive in the ED and are triaged to Labor and Delivery (L&D) or who receive
Emergency care in a L&D Triage unit, and if there is no ED record or if the discharge date is only
documented within the L&D record, select UTD for the ED Departure Date.
Suggested Data Sources:
Only Acceptable Sources:
• Emergency Department record
Inclusion Guidelines for Abstraction:
• ED departure date
• ED discharge date
• ED leave date
Exclusion Guidelines for Abstraction:
• Disposition date
• Departure or discharge date from an L&D record

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Data Element Name: ED Departure Time
Collected For: OP-18
Definition: The time (military time) represented in hours and minutes at which the patient departed from the
emergency department.
Suggested Data Collection Question: What is the time the patient departed from the emergency
department?
Format:
Length: 5 – HH-MM (with or without colon) or UTD
Type:
Time
Occurs: 1
Allowable Values:
HH
= Hour (00–23)
MM
= Minutes (0–59)
UTD
= Unable to Determine
Time must be recorded in military time format.
With the exception of midnight and noon:
• If the time is in the a.m., conversion is not required.
• If the time is in the p.m., add 12 to the clock time hour.
Examples:
o Midnight = 0000 Noon = 1200
o 5:31 a.m. = 0531 5:31 p.m. = 1731
o 11:59 a.m. = 1159 11:59 p.m. = 2359
Note: 0000 = midnight. If the time is documented as 0000 11-24-20xx, review supporting documentation to
determine if the ED Departure Date should remain 11-24-20xx or if it should be converted to 11-25-20xx.
When converting midnight, or 2400, to 0000, do not forget to change the ED Departure Date.
Example:
o Midnight or 2400 on 11-24-20xx = 0000 on 11-25-20xx.
Notes for Abstraction:
•
•
•

The intention is to capture the latest time at which the patient was receiving care in the emergency
department, under the care of emergency department services, or awaiting transport to service/care.
For times that include seconds, remove the second and record the time as is.
Example:
o 1500:35 would be recorded as 1500.
The medical record must be abstracted as documented (taken at “face value”). When the time
documented is obviously in error (not a valid format/range) and no other documentation is found that
provides this information, the abstractor should select UTD.

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•
•
•
•

•

•
•
•

Example:
o Documentation indicates the ED departure time was 3300. No other documentation in the list of
Only Acceptable Sources provides a valid time. Since the ED Departure Time is outside of the
range in the Allowable Values for Hour, it is not a valid time, and the abstractor should select UTD.
Note: Transmission of a case with an invalid time as described above will be rejected from the
CMS Clinical Data Warehouse. Use of UTD for ED Departure Time allows the case to be accepted
into the warehouse.
ED Departure Time is the documented time the patient physically left the emergency department.
Do not use the time the discharge order was written because it may not represent the actual time
of departure.
If there is a discharge time listed on the disposition sheet, this may be used for ED Departure Time.
When more than one emergency department departure/discharge time is documented, abstract the
latest time.
Examples:
o ED nursing notes contain documentation that the patient was transferred to floor at 1800 and
transport documentation states that patient left the ED via stretcher at 1815. There are multiple
times documented for departure. Use the later time of 1815 as ED Departure Time.
o ED nursing notes contain documentation that the patient departed the ED at 0500. ED record
contains documentation of medication administration at 0510 and that the patient departed the ED
at 0620. Physician notes contain documentation of an assessment at 0540. As there are multiple
departure times documented, enter 0620 for ED Departure Time, as it is the latest time documented.
If the time the patient departed is unable to be determined from medical record documentation,
select UTD.
Example:
o ED nursing notes documented patient departed from the ED at 1225. Nursing notes document
medication administration at 1245. Physician progress notes document assessment at 1310. There is
substantial documentation to support that the patient was in the ED after documented departure and
no additional documented time of ED departure. Enter UTD for ED Departure Time.
If ED Departure Time is documented prior to arrival, abstract as UTD.
If patient expired in the ED, use the time of death as the departure time.
The inclusion and exclusion lists are not to be considered comprehensive lists of inclusions
and exclusions.

Observation Status:
• For patients who are placed into observation services, use the time of the physician/APN/PA order for
observation for ED Departure Time.
• If the physician/APN/PA observation order time is after the documented ED departure time, use the
documented ED departure time.
• The intent of this guidance is to abstract the time that the patient is no longer under the care of the ED.
When a patient is placed into observation, their clinical workflow may vary from patients who are not
placed into observation prior to departure from the ED, so the observation order may be used instead of
the actual ED departure time.
Obstetric ED considerations:
• For patients who arrive in the ED and are triaged to Labor and Delivery (L&D) or who receive
emergency care in a L&D Triage unit, and if there is no ED record or if the discharge time is only
documented within the L&D record, select UTD for the ED Departure Time.
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Suggested Data Sources:
Only Acceptable Sources:
• Emergency Department record
Inclusion Guidelines for Abstraction:
• ED leave time
• ED discharge time
• ED departure time
• ED checkout time
• ED order for observation status
• Gone time]
• Transfer time]
• The event log, registration sheet, transfer record, etc. (if a discharge time is noted and the document is
part of the permanent record)]
• Release Time
• Out time
• Transport documented time
Exclusion Guidelines for Abstraction:
• Report called time
• Disposition time
• Discharge instructions time
• Coding summary
• Physician’s discharge summary
• ED record released from holding time
• Chart closed time
• Off the tracking board time]
• Departure or discharge time from an L&D record

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Data Element Name: First Name
Collected For: All records
Definition: The patient’s first name.
Suggested Data Collection Question: What is the patient’s first name?
Format:
Length: 30
Type:
Character
Occurs: 1
Allowable Values:
Enter the patient’s first name.
Notes for Abstraction: None
Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Head CT or MRI Scan Interpretation Date
Collected For: OP-23
Definition: The month, day, and year at which the earliest head CT or MRI scan interpretation was
completed or reported.
Suggested Data Collection Question: What is the date the earliest head CT or MRI scan interpretation was
completed or reported?
Format:
Length: 10 – MM-DD-YYYY (includes dashes) or UTD
Type:
Date
Occurs: 1
Allowable Values:
MM
= Month (01-12)
DD
= Day (01-31)
YYYY = Year (20xx)
UTD
= Unable to Determine
Notes for Abstraction:
• The medical record must be abstracted as documented (taken at “face value”). When the date
documented is obviously in error (not a valid format/range) or outside of the parameters of care and no
other documentation is found that provides this information, the abstractor should select UTD.
Examples:
o Documentation indicates the Head CT or MRI Scan Interpretation Date was 03-42-20xx. No other
documentation in the list of Suggested Data Sources provides a valid date. Since the Head CT or
MRI Scan Interpretation Date is outside of the range listed in the Allowable Values for Day, it is
not a valid date, and the abstractor should select UTD.
o Patient expires on 02-12-20xx, and all documentation within the Suggested Data Sources indicates
the Head CT or MRI Scan Interpretation Date was 03-12-20xx. Other documentation in the
medical record supports the date of death as being accurate. Since the Head CT or MRI Scan
Interpretation Date is after the date of death, it is outside of the parameter of care, and the
abstractor should select UTD.
Note: Transmission of a case with an invalid date as described above will be rejected from the
CMS Clinical Data Warehouse. Use of UTD for Head CT or MRI Scan Interpretation Date allows
the case to be accepted into the Warehouse.
• Enter the date associated with Head CT or MRI Scan Interpretation Time.
Examples:
o CT Head WO contrast resulted (date)
o Imaging final result CT Head WO contrast(date)
o Results were relayed to physician / discussed with physician (date)
o Imaging result in the EHR: Electronically signed by: M.D. (date)
o CT/CTA/MRI/MRA scan report date/time
• If the date of the head CT or MRI scan interpretation is unable to be determined from medical record
documentation, abstract UTD.

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•
•
•

Abstract the result of the earliest head CT or MRI scan interpretation (closest to arrival).
If there are multiple result dates documented for the same head CT or MRI scan, use the
earliest result date.
Computed Tomography Angiography (CTA) and Magnetic Resonance Angiography (MRA) of the head
or brain is acceptable for abstraction.

Suggested Data Sources:
• Emergency Department record
Inclusion Guidelines for Abstraction:
Head CT or MRI Scan
• Brain CT
• Brain CTA
• Head CT
• Head CTA
• Brain MRI
• Brain MRA
• Head MRI
• Head MRA
• Head or brain computed tomography angiography (CTA)
• Head or brain CT angiography
• Head or brain computed or computerized tomography (CT)
• Head or brain magnetic resonance angiogram (MRA)
• Head or brain magnetic resonance imaging (MRI)
• Enhanced or unenhanced MR imaging
Exclusion Guidelines for Abstraction: None

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Data Element Name: Head CT or MRI Scan Interpretation Time
Collected For: OP-23
Definition: The time (military time) represented in hours and minutes at which the earliest head CT or MRI
scan interpretation was completed or reported.
Suggested Data Collection Question: What is the time the earliest head CT or MRI scan interpretation was
completed or reported?
Format:
Length: 5 – HH-MM (with or without colon) or UTD
Type:
Time
Occurs: 1
Allowable Values:
HH
= Hour (00–23)
MM
= Minutes (0–59)
UTD
= Unable to Determine
Time must be recorded in military time format.
With the exception of midnight and noon:
• If the time is in the a.m., conversion is not required.
• If the time is in the p.m., add 12 to the clock time hour.
Examples:
o Midnight = 0000 Noon = 1200
o 5:31 a.m. = 0531 5:31 p.m. = 1731
o 11:59 a.m. = 1159 11:59 p.m. = 2359

Note: 0000 = midnight. If the time is documented as 0000 11-24-20xx, review supporting documentation to
determine if the Head CT or MRI Scan Interpretation Date should remain 11-24-20xx or if it should be
converted to 11-25-20xx.
When converting midnight, or 2400, to 0000, do not forget to change the Head CT or MRI Scan
Interpretation Date.
Example:
o Midnight or 2400 on 11-24-20xx = 0000 on 11-25-20xx.
Notes for Abstraction:
• For times that include seconds, remove the seconds and record the time as is.
Example:
o 1500:35 would be recorded as 1500.
• If the Head CT or MRI Scan Interpretation Time is unable to be determined from medical record
documentation, select UTD.
• The medical record must be abstracted as documented (taken at “face value”). When the time
documented is obviously in error (not a valid time) and no other documentation is found that provides
this information, the abstractor should select UTD.

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•
•
•
•
•
•
•

•

Example:
o Documentation indicates the head CT or MRI scan interpretation was 3300. No other
documentation in the medical record provides a valid time. Since the Head CT or MRI Scan
Interpretation Time is outside of the range listed in the Allowable Values for Hour, it is not a valid
time, and the abstractor should select UTD.
Note: Transmission of a case with an invalid time as described above will be rejected from the
CMS Clinical Data Warehouse. Use of UTD for Head CT or MRI Scan Interpretation Time allows
the case to be accepted into the warehouse.
If the time of the head CT or MRI scan interpretation is unable to be determined from medical record
documentation, abstract UTD.
Abstract the result of the earliest head CT or MRI scan interpretation (closest to arrival).
The dictation time or the time of a preliminary interpretation may be abstracted if it is known to be an
accurate representation of when the earliest head CT or MRI scan interpretation time occurred.
If there are multiple result times documented for the same head CT or MRI scan, use the earliest
result time.
If the head CT or MRI scan interpretation is documented prior to arrival, abstract UTD.
It is acceptable to use nurse documentation of a head CT or MRI scan interpreted by a physician. The
interpretation must be performed by the physician/APN/PA, but it can be documented by a nurse.
Head CT or MRI Scan Interpretation Time should not be abstracted as the time the results of the scan
were relayed to the ED physician/APN/PA if an earlier interpretation time is documented.
Example:
o Radiology head CT report at 1100. ED physician notes: “Received head CT report at 1130.” Head
CT or MRI Scan Interpretation Time is 1100.
o Preliminary CT dictated by radiologist at 2205. ED physician documents “Findings discussed directly
with radiologist at 2209.” Head CT or MRI Scan Interpretation Time is 2205.
o Nurse documents “CT scan completed at 1400; physician notified of results at 1445.” Head CT or
MRI Scan Interpretation Time is 1445.
Computed Tomography Angiography (CTA) and Magnetic Resonance Angiography (MRA) of the head
or brain is acceptable for abstraction.
Example:
o CTA ordered per stroke protocol; unenhanced CT image results relayed to ED physician at 1318;
CTA final report at 1500. Head CT or MRI Scan Interpretation Time is 1318.

Suggested Data Sources:
• Emergency Department record
Inclusion Guidelines for Abstraction:
Head CT or MRI Scan
• Brain CT
• Brain CTA
• Head CT
• Head CTA
• Brain MRI
• Brain MRA
• Head MRI
• Head MRA
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•
•
•
•
•
•

Head or brain computed tomography angiography (CTA)
Head or brain CT angiography
Head or brain computed or computerized tomography (CT)
Head or brain magnetic resonance angiogram (MRA)
Head or brain magnetic resonance imaging (MRI)
Enhanced or unenhanced MR imaging

Exclusion Guidelines for Abstraction: None

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Data Element Name: Head CT or MRI Scan Order
Collected For: OP-23
Definition: Documentation in the medical record that a Computerized Tomography (CT) or Magnetic
Resonance Imaging (MRI) scan of the head was ordered during an emergency department visit.
Suggested Data Collection Question: Was a head CT or MRI scan ordered by the physician during the
emergency department visit?
Format:
Length: 1
Type:
Alphanumeric
Occurs: 1
Allowable Values:
Y (Yes) There is documentation a head CT or MRI scan was ordered by the physician/APN/PA during the
emergency department visit.
N (No)

There is no documentation a head CT or MRI scan was ordered by the physician/APN/PA during
the emergency department visit.

Notes for Abstraction:
• If there is documentation a head CT or MRI scan is ordered during the emergency department visit but is
cancelled and there are no other head CT or MRI scans ordered during the emergency department visit,
abstract No.
• An order for a CT Angiography (CTA) or Magnetic Resonance Angiography (MRA) of the head or brain
is acceptable for abstraction.
Suggested Data Sources:
• Nurses notes
• Physician notes/orders
• Radiology notes
Inclusion Guidelines for Abstraction:
Head CT or MRI Scan
• Brain CT
• Brain CTA
• Head CT
• Head CTA
• Brain MRI
• Brain MRA
• Head MRI
• Head MRA
• Head or brain computed tomography angiography (CTA)
• Head or brain CT angiography
• Head or brain computed or computerized tomography (CT)
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•
•
•

Head or brain magnetic resonance angiogram (MRA)
Head or brain magnetic resonance imaging (MRI)
Enhanced or unenhanced MR imaging

Exclusion Guidelines for Abstraction: None

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Data Element Name: Hispanic Ethnicity
Collected For: All records
Definition: Documentation that the patient is of Hispanic, Latino, or Spanish ethnicity.
Suggested Data Collection Question: Is the patient of Hispanic Latino, or Spanish ethnicity?
Format:
Length: 1
Type:
Character
Occurs: 1
Allowable Values:
Y (Yes) Patient is of Hispanic, Latino, or Spanish ethnicity.
N (No)

Patient is not of Hispanic, Latino, or Spanish ethnicity, or unable to determine from medical record
documentation.

Notes for Abstraction:
• The data element Race is required in addition to this data element.
Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction:
A person of Cuban, Mexican, Puerto Rican, South or Central American, or other Spanish culture or origin,
regardless of race. The term “Spanish origin” can be used in addition to “Hispanic or Latino.”
Examples:
o Black-Hispanic
o Chicano
o Colombian
o Ecuadorian
o Dominican
o Guatemalan
o H
o Hispanic
o Latin American
o Latino/Latina
o Mexican-American
o Salvadoran
o Spaniard
o Spanish
o White-Hispanic
Exclusion Guidelines for Abstraction: None

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Data Element Name: ICD-10-CM Principal Diagnosis Code
Collected For: OP-18, OP-23
Definition: The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10CM) code associated with the diagnosis established after study to be chiefly responsible for the outpatient
encounter.
Suggested Data Collection Question: What was the ICD-10-CM code selected as the principal diagnosis
for this record?
Format:
Length: 8 (without decimal point or dot)
Type:
Alphanumeric
Occurs: 1
Allowable Values:
Any valid diagnosis code as per the CMS ICD-10-CM master code table (Code Descriptions in Tabular
Order): https://www.cms.gov/Medicare/Coding/ICD10/index.html
Notes for Abstraction: None
Suggested Data Sources:
• Outpatient record
• Emergency Department record
• UB-04
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Last Known Well
Collected For: OP-23
Definition: The date and time prior to hospital arrival at which it was witnessed or reported that the patient
was last known to be without the signs and symptoms of the current stroke or at his or her baseline state of
health.
Suggested Data Collection Question: Is there documentation that the date and time of Last Known Well
was witnessed or reported?
Format:
Length: 1
Type:
Alphanumeric
Occurs: 1
Allowable Values:
Y (Yes) There is documentation that the date and time of Last Known Well was witnessed or reported.
N (No)

There is no documentation that the date and time of Last Known Well was witnessed or reported,
or Unable to Determine from medical record documentation.

Notes for Abstraction:
• Select Yes if both a date Last Known Well and a Time Last Known Well are documented.
• Select No if there is any physician/APN/PA documentation that the Time Last Known Well is
“unknown.” Documentation must explicitly state that the Time Last Known Well is unknown/uncertain.
o If one physician/APN/PA documents Time Last Known Well unknown, and another documents a
Time Last Known Well, select No.
Exception:
o If the physician/APN/PA documents Last Known Well as unknown and the same
physician/APN/PA crosses out unknown or mentions in a later note that Last Known Well is now
known with a time documented, select Yes.
• Documentation must explicitly state that the Time Last Known Well is unknown/uncertain/unclear.
Documentation that time of symptom onset is unknown/uncertain/unclear is also acceptable when Time
Last Known Well is not documented. If Last Known Well is not explicitly documented as unknown, do
not make inferences (e.g., do not assume that patient awoke with stroke so Last Known Well unknown
unless explicitly documented).
o If one physician/APN/PA documents a Time Last Known Well and another documents time of
symptom onset unknown, select Yes.
o If the physician/APN/PA documents time of symptom onset is unknown, and a Time Last Known
Well is not documented, select No.
o If one physician/APN/PA documents a Time Last Known Well and nurse/EMS documents Last
Known Well unknown, select Yes.
• If the Time Last Known Well is clearly greater than 2 hours prior to hospital arrival and no specific time
is documented, select No.
Example:
o “Patient OK last night.” Select No because no other documentation of a specific time/time range/time
reference was present in the medical record and the time is required for the Time Last Known Well.

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•

If there is no documentation that Last Known Well or stroke signs/symptoms occurred prior to hospital
arrival but there is documentation that Last Known Well first occurred after Arrival Time (e.g., in-house
stroke), select No.

Suggested Data Sources:
• Ambulance record
• Code Stroke Form/template
• Emergency department record
• History and Physical
• Nursing flow sheets
• Progress notes
• Transfer sheet
Inclusion Guidelines for Abstraction:
Signs and Symptoms of Stroke
• Sudden numbness or weakness of the face, arm, or leg, especially on one side of the body
• Sudden confusion, trouble speaking or understanding
• Sudden trouble seeing in one or both eyes
• Sudden trouble walking, dizziness, loss of balance or coordination
• Sudden severe headache
• Syncope
• Seizure
Exclusion Guidelines for Abstraction: None

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Data Element Name: Last Name
Collected For: All records
Definition: The patient’s last name.
Suggested Data Collection Question: What is the patient’s last name?
Format:
Length: 60
Type:
Character
Occurs: 1
Allowable Values:
Enter the patient’s last name.
Notes for Abstraction: None
Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Outpatient Encounter Date
Collected For: All records
Definition: The documented month, day, and year the patient arrived in the hospital outpatient setting.
Suggested Data Collection Question: What was the date the patient arrived in the hospital outpatient
setting?
Format:
Length: 10 – MM-DD-YYYY (includes dashes)
Type:
Date
Occurs: 1
Allowable Values:
MM
= Month (01-12)
DD
= Day (01-31)
YYYY = Year (20xx)
Notes for Abstraction:
• The intent of this data element is to determine the date the patient arrived in the hospital outpatient
setting.
• UTD is not an allowable value.
• Consider the outpatient encounter date as the earliest documented date the patient arrived in the
applicable hospital outpatient setting.
Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction:
• Preoperative tests or screening

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Data Element Name: Patient Identifier
Collected For: All records
Definition: The number used by the hospital to identify this patient’s hospital outpatient encounter.
The number provided will be used to identify the patient in communications with the hospital outpatient
setting, e.g., Medical Record Number, Account Number, Unique Identifiable Number as determined by
the facility, etc.
A Patient Identifier is required.
Suggested Data Collection Question: What was the number used to identify this outpatient encounter?
Format:
Length: 40
Type:
Character
Occurs: 1
Allowable Values:
Up to 40 letters and/or numbers
Notes for Abstraction: The only characters that will be allowed are spaces, hyphens, dashes and
under-scores .
]

Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Payment Source
Collected For: All records
Definition: The source of payment for this outpatient encounter.
Suggested Data Collection Question: What is the patient’s source of payment for this outpatient encounter?
Format:
Length: 1
Type:
Alphanumeric
Occurs: 1
Allowable Values:
1 Source of payment is Medicare.
2 Source of payment is Non-Medicare.
Notes for Abstraction:
• If Medicare is listed as the primary, secondary, tertiary, or even lower down on the list of payers,
select 1.
• If the patient is an Undocumented Alien or illegal immigrant, select 1.
Undocumented Alien: Section 1011 of the Medicare Modernization Act of 2003 allows for
reimbursement for services rendered to patients who are: Undocumented aliens, aliens paroled into a
United States port of entry for the purpose of receiving eligible services, and Mexican citizens permitted
to enter the United States for not more than 72 hours under the authority of a laser visa, issued in
accordance with the requirements of regulations prescribed under the Immigration and Nationality Act .
]

Suggested Data Sources:
• Face sheet
• UB-04
Inclusion Guidelines for Abstraction:
Medicare includes, but is not limited to:
• Black Lung
• End Stage Renal Disease (ESRD)
• Medicare Fee-for-Service (includes DRG or PPS)
• Medicare HMO/Medicare Advantage
• Medicare Part A, B, C, D, F, G, K, L, M, and N
• Medicare Secondary Payer
• Railroad Retirement Board (RRB)
Exclusion Guidelines for Abstraction: None

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Data Element Name: Physician 1
Collected For: All records (optional element)
Definition: The first physician identifier.
Suggested Data Collection Question: What is the first physician identifier?
Format:
Length: 50
Type:
Alphanumeric
Occurs: 1
Allowable Values:
Enter the first physician identifier, as directed. Up to 50 letters, numbers, and/or special characters can be
entered.
Note: Only the following special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ` - = [ ] \ ; ‘ . , / and space
Notes for Abstraction:
This data element may be used to capture physician information that might be helpful in internal analysis.
This information is for internal analysis only and will not be shared with any external parties in any
data output.
Suggested Data Sources: None
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Physician 2
Collected For: All records (optional element)
Definition: A second physician identifier.
Suggested Data Collection Question: What is the second physician identifier?
Format:
Length: 50
Type:
Alphanumeric
Occurs: 1
Allowable Values:
Enter the second physician identifiers, as directed. Up to 50 letters, numbers, and/or special characters can be
entered.
Note: Only the following special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ‘ - = [ ] \ ; . , / and space
Notes for Abstraction:
This data element may be used to capture physician information that might be helpful in internal analysis.
This information is for internal analysis only and will not be shared with any external parties in any data
output.
Suggested Data Sources: None
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Postal Code
Collected For: All records
Definition: The postal code of the patient’s residence. For United States ZIP codes, the hyphen is implied. If
the patient is determined to not have a permanent residence, then the patient is considered homeless.
Suggested Data Collection Question: What is the postal code of the patient’s residence?
Format:
Length: 9
Type:
Character
Occurs: 1
Allowable Values:
Any valid five or nine-digit postal code, or “homeless” if the patient is determined not to have a permanent
residence. If the patient is not a resident of the United States, use “non-US.”
Notes for Abstraction:
• If the postal code of the patient is unable to be determined from medical record documentation, enter the
provider’s postal code.
Suggested Data Sources:
• Outpatient record
• Emergency Department record
• UB-04
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Race
Collected For: All records
Definition: Documentation of the patient’s race.
Suggested Data Collection Question: What is the patient’s race?
Format:
Length: 1
Type:
Character
Occurs: 1
Allowable Values:
1 White: Patient’s race is White, or the patient has origins in Europe, the Middle East, or North Africa.
2 Black or African American: Patient’s race is Black or African American.
3 American Indian or Alaska Native: Patient’s race is American Indian/Alaska Native.
4 Asian or Pacific Islander: Patient’s race is Asian/Pacific Islander.
5 Retired Value: effective January 1, 2021, encounters.
7 UTD: Unable to determine the patient’s race or not stated (e.g., not documented, conflicting
documentation, or patient unwilling to provide).
Notes for Abstraction:
• The data element Hispanic Ethnicity is required in addition to this data element.
• If documentation indicates the patient has more than one race (e.g., Black-White, Indian-White), select
the first listed race.
• Although the terms “Hispanic,” “Latino,” and “Spanish” are descriptions of the patient’s ethnicity, it is
not uncommon to find them referenced as race. If the patient’s race is documented only as Hispanic,
Latino, or Spanish, select “White.” If the race is documented as mixed Hispanic/Latino with another race,
use whatever race is given (e.g., Black-Hispanic – select “Black”). Other terms for Hispanic, Latino, or
Spanish include Chicano, Cuban, H (for Hispanic), Latin American, Latina, Mexican, MexicanAmerican, Puerto Rican, and South or Central American.
Suggested Data Sources:
• Outpatient record
• Emergency Department record
Inclusion Guidelines for Abstraction:
Black or African American: A person having origins in any of the black racial groups of Africa (e.g.,
Jamaican, Haitian, Nigerian, Ethiopian, Somali, Negro).
American Indian or Alaska Native: A person having origins in any of the original peoples of North
America (including Central America) and who maintains tribal affiliation or community attachment (e.g.,
any recognized tribal entity in North and Central America, Native American).
Asian or Pacific Islander: A person having origins in any of the original peoples of the Far East, Southeast
Asia, or the Indian subcontinent including, for example, Cambodia, China, India, Japan, Korea, Malaysia,
Pakistan, the Philippine Islands, the Pacific Islands, Native Hawaiian, Guam, Samoa, Thailand, and Vietnam.

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White: A person having origins in any of the original peoples of Europe, the Middle East, or North Africa
(e.g., German, Irish, English, Italian, Lebanese, Egyptian).
Exclusion Guidelines for Abstraction: None

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Data Element Name: Sex
Collected For: All records
Definition: The patient’s documented sexual orientation and/or gender identity.
Suggested Data Collection Question: What is the patient’s sexual orientation and/or gender identity?
Format:
Length: 1
Type: Alphanumeric
Occurs: [1- 6]
Allowable Values:
Select all that apply:
1 = Male
2 = Assigned/Designated Male at Birth
3 = Female
4 = Assigned/Designated Female at Birth
5 = LGBTQ
6 = Unknown
Notes for Abstraction:
• Select any of the values that are applicable. The data element and values encompass both the patient’s
current gender identity and one assigned at birth.
• Consider the sex to be unable to be determined and select “Unknown” if the patient refuses to provide
their sexual orientation and/or gender identity. If “Unknown” is selected, then no other value should be
selected.
Suggested Data Sources:
• Consultation notes
• Emergency Department record
• Face sheet
• History and Physical
• Nursing admission notes
• Progress notes
• UB-04
Inclusion Guidelines for Abstraction:
LGBTQ (Value 5)
•
•
•
•
•
•
•

LGBTQIA, LGBTQ+, LGBTQIA2
Lesbian, gay, or bisexual
MSM (men who have sex with men)
Queer, Genderqueer
Pansexual
Asexual
Transgender

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•
•
•
•
•

Gender non-conforming
Two-spirit
Non-binary
Gender diverse
People/person with intersex traits

Exclusion Guidelines for Abstraction: None

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Data Element Name: Time Last Known Well
Collected For: OP-23
Definition: The time prior to hospital arrival at which the patient was last known to be without the signs and
symptoms of the current stroke or at his or her baseline state of health.
Suggested Data Collection Question: At what time was the patient last known to be well or at his or her
prior baseline state of health?
Format:
Length: 5 – HH-MM (with or without colon) or UTD
Type:
Time
Occurs: 1
Allowable Values:
HH
= Hour (00–23)
MM
= Minutes (00–59)
UTD
= Unable to Determine
Time must be recorded in military time format.
With the exception of midnight and noon:
• If the time is in the a.m., conversion is not required.
• If the time is in the p.m., add 12 to the clock time hour.
Examples:
o Midnight = 0000
Noon = 1200
o 5:31 a.m. = 0531
5:31 p.m. = 1731
o 11:59 a.m. = 1159 11:59 p.m. = 2359
Note: 0000 = midnight. If the time is documented as 0000 11-24-20XX, review supporting documentation to
determine if the Date Last Known Well should remain 11-24-20xx or if it should be converted to 11-25-20xx.
When converting midnight, or 2400, to 0000, do not forget to change the Date Last Known Well.
Example:
o Midnight or 2400 on 11-24-20XX = 0000 on 11-25-20XX.
Notes for Abstraction:
• For times that include seconds, remove the seconds and record the time as is.
Example:
o 1500:35 would be recorded as 1500
• If the Time Last Known Well is unable to be determined from medical record documentation, select UTD.
Exception:
• If the only Time Last Known Well is documented as a time immediately before hospital arrival without a
specific time range in minutes, e.g., “symptoms started just prior to ED arrival,” and no other
documentation mentioning Time Last Known Well is available in the medical record, use the Arrival
Time for Time Last Known Well.
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•

•

•
•
•

•

The medical record must be abstracted as documented (taken at “face value”). When the time
documented is obviously in error (not a valid time) and no other documentation is found that provides
this information, the abstractor should select UTD.
Example:
o Documentation indicates the Time Last Known Well was 3300. No other documentation in the
medical record provides a valid time. Since the Time Last Known Well is outside of the range listed
in the Allowable Values for Hour, it is not a valid time, and the abstractor should select UTD.
Note: Transmission of a case with an invalid time as described above will be rejected from the CMS
Clinical Data Warehouse. Use of UTD for Time Last Known Well allows the case to be accepted into
the Warehouse.
If the Time Last Known Well is documented as a specific time and entered as Time Last Known Well on a
Code Stroke Form or stroke-specific electronic template, enter that time as the Time Last Known Well.
Documentation of the Time Last Known Well on a stroke-specific form or template should be selected
regardless of other times last known well documented elsewhere in the medical record.
Exceptions:
o Any physician/APN/PA documentation that Last Known Well/onset of signs/symptoms is
unknown/uncertain/unclear takes precedence over specific time on a Code Stroke Form.
o Crossing out of a specific time on a Code Stroke Form and a specific time documented on the same
or different Code Stroke Form, use the specific time that is not crossed out.
o A specific time on a Code Stroke Form and another time reference documented, e.g., 8 hours, on the
same or different Code Stroke Forms, use the specific time.
o Multiple specific times on the same or different Code Stroke Forms, use abstraction guidelines for
multiple times Last Known Well.
o If unable to determine if a form is a Code Stroke Form, continue to review the medical record for
Time Last Known Well documentation in other sources.
If the Time Last Known Well is documented as being a specific number of hours prior to arrival (e.g., felt
left side go numb 2 hours ago) rather than a specific time, subtract that number from the time of ED
arrival and enter that time as the Time Last Known Well.
If the Time Last Known Well is noted to be a range of time prior to ED arrival (e.g., felt left side go numb
2 hours to 3 hours ago), assume the maximum time from the range (e.g., 3 hours), and subtract that
number of hours from the time of arrival to compute the Time Last Known Well.
If both the Time Last Known Well and symptom onset are documented, select the Time Last Known Well.
Examples:
o H&P states, “Patient watching TV with family and complained of blurred vision in both eyes at
8:30 PM.” ED MD notes, “Patient normal at 8:30 PM.” Time Last Known Well is 2030.
o “Patient was doing well at 4:30 PM – noticed difficulty speaking around 6:00 pm.” Time Last
Known Well is 1630.
o “Patient normal at 2200 before going to bed. Awoke at 0200 with headache and took two aspirin
before returning to sleep. OK at 0700 and went to work. Felt confused, unable to speak without
slurring at 0800.” Time Last Known Well is 0700.
If the only time documented is time of symptom onset without mention of when the patient was last
known well, use the time of symptom onset for the Time Last Known Well.
Example:
o “Sudden onset headache one hour before ED arrival,” documented by ED MD. Arrival Time 1924.
No other documentation referencing time last known well available in the medical record. Time
Last Known Well is 1824.

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•

•
•

•
•
•

If there are multiple times of last known well documented in the absence of the Time Last Known Well
explicitly documented on a Code Stroke Form, use physician/APN/PA documentation first before other
sources, e.g., nursing, EMS.
Example:
o “Patient last seen normal this morning at 1000” per H&P. ED nurse documented 0950 as time last
well. Time Last Known Well is 1000.
If multiple times last known well are documented by the same or different physicians/APNs/PAs, use the
earliest time documented.
If there is documentation of one or more episodes of stroke symptoms and documentation of symptom
resolution between episodes, use the time of the most recent (last) episode prior to arrival, regardless if
all symptoms resolved prior to arrival.
Examples:
o “Patient reported right hand paresthesia two days ago that resolved spontaneously after a few
minutes. New onset of symptoms today around 0700 involving right arm and right leg.” Time Last
Known Well is 0700.
o “Wife states that he was having trouble with slurred speech and confusion yesterday. Symptom free this
morning. Return of symptoms with facial droop noted around noon.” Time Last Known Well is 1200.
o “Wife noticed slurred speech at 8:30 last night. Without symptoms early this morning. Wife noticed
slurred speech again at 9:00 during breakfast conversation.” Time Last Known Well is 0900.
o “Wife noticed slurred speech at 8:30 last night. Symptom-free this morning. Came to ED to get
checked out.” Time Last Known Well is 2030.
A Code Stroke Form is used by the stroke team or ED staff to document the acute stroke process. See the
inclusion list for acceptable terms used for a Code Stroke Form. The list is not all-inclusive.
Time Last Known Well on a Code Stroke Form may be documented by a nurse or other member of the
care team authorized to serve as a scribe.
If the time is noted to be “less than” a period of time prior to ED arrival, assume the maximum range.
Example: Time Last Known Well less than one hour ago. Subtract one hour from the time of arrival to
compute Time Last Known Well.

Suggested Data Sources:
• Ambulance record
• Code Stroke Form/template
• Emergency Department record
• History and physical
• IV flow sheets
• Medication administration record
• Nursing flow sheets
• Progress notes
• Transfer sheet
Inclusion Guidelines for Abstraction:
Signs and Symptoms of Stroke
• Sudden numbness or weakness of the face, arm, or leg, especially on one side of the body
• Sudden confusion, trouble speaking or understanding
• Sudden trouble seeing in one or both eyes
• Sudden trouble walking, dizziness, loss of balance or coordination
• Sudden severe headache
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•
•

Syncope
Seizure

Code Stroke Form
• Stroke Activation Form
• Stroke Alert Form
• Stroke Assessment Form
• Stroke Intervention Form
• Stroke Rapid Response Form
• Thrombolysis Checklist
• tPA Eligibility Form
Exclusion Guidelines for Abstraction:
Code Stroke Form
• Stroke Education Form
• Core Measure Form

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Missing and Invalid Data
Introduction
Missing data are data elements required for calculating a hospital outpatient measure that have no values
present for one or more encounters. Invalid data are data element values required for calculating a hospital
outpatient measure that fall outside of the range of allowable values defined for that data element.
Reducing the levels of missing and invalid data is important as it minimizes the potential for measure rate
bias. Because records with missing or invalid data cannot be included in the calculation of the observed
measure rate, a measure’s observed rate may not accurately reflect the patient population. The excluded
records may have differed significantly from the records with no missing data (i.e., the records remaining
may not be representative of the actual population).
Data Collection and the Unable to be Determined (UTD) Allowable Value
Abstractors provide an answer to every data element that is applicable per the combined skip logic for all
measures in a hospital outpatient measure set for the record to be deemed complete and to not be rejected.
While there is an expectation that all data elements are collected, it is recognized that, in certain situations,
information may not be available (dates, times, codes, etc.). If, after due diligence, the abstractor determines
that a value is not documented or is not able to determine the answer value, the abstractor must select UTD
as the answer. Note that some data elements do not allow a UTD value for data transmission. The UTD
allowable value is used as follows:
•
•

•
•

Birthdate, CPT® Code, E/M Code, ICD-10-CM Principal and Outpatient Encounter Date do not have a
UTD allowable value for data transmission. Encounter records containing UTD for any of these data
elements are rejected when submitted.
Date, time, and numeric data elements, other than Birthdate and Outpatient Encounter Date, have a UTD
allowable value option.
o Rate-based algorithms evaluate records to a Measure Category Assignment = D (failed) when a date,
time, or numeric data element containing an allowable value of UTD is evaluated.
o Continuous variable algorithms evaluate records to a Measure Category Assignment = Y
(UTD value exists) when a date, time, or numeric data element containing an allowable value
of UTD is evaluated.
o The method by which data collection software collects UTD information is determined by each
software vendor, except the software cannot automatically default to a UTD answer. The decision to
enter a UTD for each data element must be made by the abstractor, not the software.
Yes/No data elements: The allowable value No incorporates UTD into the definition. Refer to the
measure algorithms in which each Yes/No data element is used to determine how the record is treated.
Data elements containing two or more categorical values: The UTD value is either classified as a
separate allowable value or included in the same category as “None of the above/Not documented.”
Refer to the measure algorithms in which each categorical data element is used to determine how the
record is treated.

Missing and Invalid Data
For rejected data to be accepted, errors must be corrected, and the data must be resubmitted before the
transmission deadline.
•

The majority of general data elements that are missing data* cause the encounter record to be rejected.
Refer to the Data Dictionary Introduction in this manual for the complete list of general data elements.

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•
•
•
•

In addition, if both the ICD-10-CM Principal Diagnosis Code and the CPT® Code data elements are
missing data*, the entire record will be rejected.
Not all patients have ICD-10-CM Other Diagnosis Codes. Records will be accepted for missing data for
this data element.
Measure-specific data elements that are missing data* cause the record to be rejected if any measure
algorithm results in a Measure Category Assignment = X (missing data). If no measure evaluates to a
category assignment of X, the record will be accepted.
General and measure-specific data elements that contain invalid data cause the record to be rejected.

*A missing value occurs when the abstractor does not select an answer for a data element (leaves it blank) or
the software incorrectly transmits a “null” instead of the correct value for a data element. A UTD allowable
value is not considered missing data.
Abstraction Software Skip Logic and Missing Data
Skip logic allows hospitals and vendors to minimize abstraction burden by using vendor software edit logic
to bypass abstraction of data elements not utilized in the measure algorithm. However, these bypassed
elements will negatively impact data quality and the hospital’s CMS chart audit validation results when
elements are incorrectly abstracted and subsequent data elements are bypassed and left blank.
The use of skip logic by hospitals and vendors is optional and not required. Hospitals should be aware of the
potential impact of skip logic on data quality, abstraction burden, and CMS chart audit validation scores.
Vendors and hospitals utilizing skip logic should closely monitor the accuracy rate of abstracted data
elements, particularly data elements placed higher in the algorithm flow.
Missing, Invalid, UTD Data Summary
•
•
•

Missing Data – No data element value is present (blank or “null”).
Invalid Data – The data element value falls outside of the range of defined allowable values.
UTD – The allowable value of UTD is present for the data element.

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Population and Sampling Specifications
Introduction
Population
Defining the population is the first step to estimate a hospital’s performance. A population is generally
defined as a collection of patients sharing a common set of universally measured characteristics, such as an
ICD-10-CM Principal Diagnosis or CPT® Code. The outpatient population and diagnosis/CPT® codes meet
this description for the hospital outpatient quality measures. For the purpose of measuring hospital outpatient
quality measures, the term “outpatient population” is defined below:
•

An outpatient population refers to all patients (Medicare and non-Medicare) who share a common set of
specified, administratively derived data elements. This may include ICD-10-CM diagnosis codes, CPT®
codes, or other population characteristics such as age.

•

Population sampling algorithms have been developed for the selected six measures. Each algorithm
defines the initial population on the basis of a limited number of criteria such as age, CPT® codes
(including Evaluation/Management [E/M] codes), and ICD-10-CM codes. These basic data elements
could be easily obtained from electronic files (e.g., from the billing department) and usually allow a
computer-based sampling process to be employed.

Note: Data entry for OP-22 will be achieved through the secure side of https://hqr.cms.gov/via an online tool
available to authorized users. Because the measure uses administrative data and not claims data to determine
the measure’s denominator population, OP-22 is not included in the ED-Throughput Population Algorithm.
The measure sets and measure populations are presented in Table 1 below.
Table 1: Hospital Outpatient Measure Sets and Measure Populations
Measure Set:
ED-Throughput
Population:
Throughput
Measure(s):
OP-18
Measure Set:
Stroke
Population:
Stroke
Measure(s):
OP-23
Measure Set:
Measures Submitted via a Web-Based Tool
Population:
Endoscopy/Cataract
Measure(s):
OP-29 and OP-31
Note: Data entry for OP-29 and OP-31 will be achieved through the secure side of https://hqr.cms.gov/via an
online tool available to authorized users. These measures use chart-abstracted data to enter a numeric value
as a numerator and denominator via the web-based tool.
For the definition of the outpatient population for each sampling population, refer to the appropriate
outpatient population discussion in the Measure Information section of this manual.
Sampling
Sampling is a process of selecting a representative part of a population in order to estimate the hospital’s
performance without collecting data for its entire population. Using a statistically valid sample, a hospital
can measure its performance in an effective and efficient manner. Sampling is a particularly useful technique
for performance measures that require primary data collection from a source such as the medical record.
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Sampling should not be used unless the hospital has a large number of cases in the outpatient population
because a fairly large number of sample cases are needed to achieve a representative sample of the
population. For the purpose of sampling hospital outpatient quality measures, the terms “sample,” “effective
sample,” and “case” are defined below:
•
•
•

The “sample” is the fraction of the population that is selected for further study.
“Effective sample” refers to the part of the sample that makes it into the denominator of an outpatient
measure set. This is defined as the sample for an outpatient measure set minus all the exclusions and
contraindications for the outpatient measure set in the sample.
A “case” refers to a single record (or an encounter) within the population. For example, during the first
quarter a hospital may have 100 patients who had a principal diagnosis associated with the OP-23
measure. The hospital’s outpatient population would include 100 cases or 100 outpatient records for
these measures during the first quarter.

To obtain statistically valid sample data, the sample size should be carefully determined, and the sample
cases should be randomly selected in such a way that the individual cases in the population have an equal
chance of being selected. Only when the sample data truly represent the whole population can the samplebased performance outpatient measure set data be meaningful and useful. Each hospital is ultimately
responsible for adhering to the sampling requirements outlined in this manual.
As a general rule/policy of CMS, providers are encouraged to submit as many cases as possible up to the
entire population of cases if reasonably feasible. For example, if the raw data can be easily extracted from an
existing electronic database or the abstraction burden is manageable, providers should consider submitting
the entire population of cases that meet the initial selection criteria. Otherwise, a statistically valid sample
can be selected.
Note: Hospitals are not required to sample their data if they elect to include all eligible cases. For example, a
hospital has 100 cases for the quarter and must select a sample of 80 cases. The hospital may choose to use
all 100 cases given the minimal benefit sampling would offer.
Order of Data Flow
Each outpatient measure set has a unique definition of outpatient population. However, the same data flow or
process steps can be used to identify the data that are transmitted to the CMS Clinical Data Warehouse.
These process steps are:
•

•
•

First, identify the outpatient population for the outpatient measure set. An outpatient population is
defined for each outpatient measure set, and the count is collected in the Outpatient Population Size data
element. This data pull utilizes administrative data such as ICD-10-CM diagnosis codes, CPT® codes,
outpatient encounter date, and birthdate.
o All ICD-10-CM diagnosis codes and CPT® codes included in the appropriate outpatient population
definition must be applied. This identification process must be completed prior to application of the
data integrity filter, outpatient measure set exclusions, and sampling methodology.
o For specific outpatient measure set definitions, refer to the appropriate outpatient population
discussion in the Measure Information section of this manual.
Second, if the hospital is sampling, use the outpatient population identified above and pull the sample of
medical records for each outpatient measure set using the requirements identified in the Quarterly
Sampling Requirements section.
Third, collect or abstract from the identified medical records the general and outpatient measure setspecific data elements that are needed for the sampling population. The count of the number of cases

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used in this step is collected in the Outpatient Sample Size data elements (If the hospital is not sampling,
the Outpatient Sample Size will equal the Outpatient Population Size).
o If the hospital is not sampling, use all medical records identified in the outpatient population.
o If the hospital is sampling, use the medical records from the cases in the identified sample.

Sample Size Requirements
Each hospital is ultimately responsible for meeting or exceeding the sample size requirements outlined
below. Hospital samples must be monitored to ensure that sampling procedures consistently produce
statistically valid and useful data. As a general rule, and based on prior experience with CMS hospital
inpatient measures, sample size requirements for this project are based on commonly accepted sampling
criteria for surveys:
•

•
•

A five percent margin of error is recommended. The margin of error is the extent of error the investigator
is willing to tolerate. Lower margins of error (e.g., three percent) would require substantially larger
sample sizes and generate more reliable results from the samples, but the burden of abstraction may not
be acceptable for most providers. Inversely, higher margins of error would require relatively smaller
sample sizes but less reliable results from those samples.
For OP-18, to reduce the burden of abstraction for smaller hospitals, a 10 percent margin of error was
employed to limit the number of cases for the sample size requirements.
The size of the population, also referred to as the universe population, is the volume of eligible patients
from which the sample will be drawn. This number is obviously expected to vary widely among
providers. Different sample size estimates are provided for various populations. See Tables 2, 3, and 4
for sample size requirements.

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•

•
•
•

•

Given that the number of cases in the sample could further be reduced during the analysis phase
due to missing data in the medical records and additional outpatient measure set-specific exclusion
criteria, hospitals are strongly advised to overestimate their sample sizes by 10 to 20 percent, or
as much as possible.
A hospital may choose to use a larger sample size than is required.
Hospitals whose outpatient population size is less than the minimum number of cases for the sampling
population must include all eligible cases in their data.
As a quality check to ensure that sampling methodology was applied correctly, the provider must run a
basic comparative analysis of common demographic variables including age distribution, gender ratio,
race/ethnicity distribution, and the proportion of Medicare patients between the sampled set and the
population of eligible patients. The relative frequencies or distribution of these common variables should
be very close between the two data sets. Any significant discrepancy should trigger a review and a restart
of the sampling process.
As indicated earlier, the adequacy of the sample size will be monitored as the project progresses and
revised, as needed. Providers that choose to sample are responsible for the sampling process. However,
for each sampled case, providers are required to clearly indicate the sample size (n) to which the case
belongs, the population size (N) from which the sample was drawn, and the proportion of Medicare and
non-Medicare patients in the sample.

Sampling Requirements
A hospital may choose to use a larger sample size than is required. Hospitals whose population size is less
than the minimum number of cases per quarter for the measure set cannot sample. Refer to Table 2 to
determine the minimum number of cases that need to be sampled for the Stroke population per quarter per
hospital for OP-23. Refer to Table 3 to determine the minimum number of cases that need to be sampled for
each population per quarter per hospital for OP-18. Refer to Table 4 to determine the annual sample size
requirements for OP-29 and OP-31.
It is important to point out that if a hospital elects to use the monthly sampling guidelines, the hospital is still
required to meet the minimum sampling requirements. Given the potential for substantial variation in
monthly sampling population sizes, the monthly sample sizes should be based on the known or anticipated
population size. When necessary, appropriate oversampling should be employed to ensure that the hospital
meets the minimum sample size requirements.
Table 2: Sample Size Requirements per Quarter per Hospital
for OP-23
Population Per Quarter
≤ 80
Quarterly Sample Size
Use all cases
Monthly Sample Size
Use all cases
Population Per Quarter
81–100
Quarterly Sample Size
80
Monthly Sample Size
27
Population Per Quarter
101–125
Quarterly Sample Size
95
Monthly Sample Size
32
Population Per Quarter
126–150
Quarterly Sample Size
109
Monthly Sample Size
37
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Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size

151–175
121
41
176–200
132
44
201–225
143
48
226–250
152
51
251–275
161
54
276–300
169
57
301–325
177
59
326–350
184
62
351–375
191
64
376–400
197
66
401–425
203
68
426–450
208
70
451–500
218
73
501–600
235
79
601–700
249
83

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Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size
Population Per Quarter
Quarterly Sample Size
Monthly Sample Size

701–800
260
87
801–900
270
90
901–1,000
278
93
1,001–2,000
323
108
2,001–3,000
341
114
3,001–4,000
351
117
4,001–5,000
357
119
5,001–10,000
370
124
≥ 10,001
377
126

Table 3: Sample Size Requirements per Quarter per Hospital for OP-18
Population Per Quarter
0–900
Quarterly Sample Size
63
Monthly Sample Size
21
Population Per Quarter
≥ 901
Quarterly Sample Size
96
Monthly Sample Size
32

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Table 4: Sample Size Requirements per Year per Hospital for
OP-29 and OP-31*
Population Per Year
0–900
Yearly Sample Size
63
Quarterly Sample Size
16
Monthly Sample Size
6
Population Per Year
≥ 901
Yearly Sample Size
96
Quarterly Sample Size
24
Monthly Sample Size
8
*If a hospital has 20 or fewer cases, it is not required to submit any data,
but it may voluntarily submit these data.
Sampling Approaches
OP-29 and OP-31
Hospitals have the option to sample from their population or submit their entire population. Hospitals that
choose to sample for these measures should use a simple sample approach, selecting the population from
cases that meet requirements to be included in the denominator. Once the population has been determined,
the sample size will be determined based on Table 4 and will either be 63 or 96 cases for the year. This will
constitute an acceptable sample methodology and will meet the annual reporting size requirements. If
hospitals choose to select data monthly or quarterly, one option they can use is to select the first month of
each quarter/year until they meet the annual reporting requirements.
Sample Size Examples
OP-18
•

A hospital’s outpatient population size for OP-18 is 700 during the third quarter. According to Table 3,
the required quarterly sample size would be 63 cases per quarter. The same hospital has an outpatient
population size for OP-18 of 2,000 during the fourth quarter. The hospital had an increase in population
size of 1,300 between quarters three and four; the required quarterly sample size would be 96 because the
quarterly sample size has been capped at 96 for population sizes of equal to or greater than 901.

OP-29 and OP-31
•

•
•

A hospital’s outpatient population size for OP-29 or OP-31 is 430 during the year. If a hospital elects to
sample monthly based on Table 4, the monthly sample size would be a minimum of six patients per
month. The hospital is ultimately responsible for meeting the yearly sample size requirement, which is a
minimum of 63 patients for the year.
A hospital’s outpatient population size for OP-29 or OP-31 is 950 during the year. According to Table 4,
the required yearly sample size would be 96 cases.
A hospital’s outpatient center performs 950 cataract operations during the year; 800 patients complete a
pre- and post-operative visual function survey. Select 96 patients out of the 800 patients that have
completed both surveys to determine the denominator and meet the required annual sample size.

Sampling Approaches
As previously stated in this section, hospitals have the option to sample from their population or submit their
entire population. Hospitals that choose to sample must ensure that the sampled data represents their
outpatient population by using either the simple random sampling or systematic random sampling method
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and that the sampling techniques are applied consistently within a quarter. For example, quarterly samples
for a sampling population must use consistent sampling techniques across the quarterly submission period.
•
•

Simple random sampling – Selecting a sample size (n) from the population of size (N) in such a way that
every case has the same chance of being selected.
Systematic random sampling – Selecting every kth record from a population size (N) in such a way that a
sample size of n is obtained, where k = N/n rounded to the lower digit. The first sample record (i.e., the
starting point) must be randomly selected before taking every kth record. This is a two-step process:
1. Randomly select the starting point by choosing a number between one and k using a table on random
number or a computer-generated random number, then
2. Select every kth record thereafter until the selection of the sample size is completed.

Each hospital is ultimately responsible that the sampling techniques applied for their hospital adhere to the
sampling requirements outlined in this manual. Performance measurement systems are responsible for
ensuring that the sampling techniques are applied consistently across their client hospitals.
Transmission of Outpatient Population and Sample Data Elements
Refer to the QualityNet website or the Hospital Outpatient Quality Measure Data Transmission section of
this manual for the most current CMS Hospital OQR Program submission requirements for transmission of
outpatient population and sample count data elements to the CMS Clinical Data Warehouse. Transmission of
outpatient population and sample count data elements are used to assist in evaluating completeness of
submission in accordance with CMS sampling requirements.
All ICD-10-CM diagnosis codes and CPT® codes included in the appropriate outpatient population definition
must be applied. This identification process must be completed prior to the application of a data integrity
filter, outpatient measure set exclusions, and sampling methodology. For specific definitions, refer to the
appropriate outpatient population in this manual.
The outpatient population and sample data elements are:
•
•
•
•
•

Outpatient Population Size – Medicare Only
Outpatient Population Size – Non-Medicare Only
Outpatient Sampling Frequency
Outpatient Sample Size – Medicare Only
Outpatient Sample Size – Non-Medicare Only

Outpatient Sampling Frequency indicates whether the hospital sampled its original population, whether the
entire population was used for the specific time period, or the hospital had five or fewer encounters for the
encounter quarter and did not submit patient-level data.
Outpatient Population and Sample Size Examples
Example 1 – Hospital does not sample
A hospital uses the OP-23 CPT® Codes (as listed in Appendix A, Table 8.0) and patient age to identify 125
cases in the OP-23 outpatient population during the second quarter. The hospital does not sample the OP-23
measure, so data for all 125 cases are collected and used to calculate the hospital’s rate for the outpatient
measure set. Forty of the 125 cases in the OP-23 outpatient population are Medicare patients.

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The breakdown of data by month and Medicare/Non-Medicare:
:

Out patient P opulation a nd Sample Size Subsets

Outpatient Population – Medicare patients
Outpatient Population – Non-Medicare patients
Total Outpatient Population Size
Outpatient Sample Size – Medicare patients
Outpatient Sample Size – Non-Medicare patients
Total Sample Size

April
10
20
30
10
20
30

May
15
30
45
15
30
45

June
15
35
50
15
35
50

Total
40
85
125
40
85
125

April
10
20
2
10
20

May
15
30
2
15
30

June
15
35
2
15
35

The following is transmitted for each month in the quarter:
Out patient Po pulatio n a nd Sam ple Size Subsets

Outpatient Population Size – Medicare only
Outpatient Population Size – Non-Medicare only
Outpatient Sampling Frequency (2 = not sampling)
Outpatient Sample Size – Medicare only
Outpatient Sample Size – Non-Medicare only

Example 2 – Hospital samples
A hospital uses the OP-23 CPT® Codes (as listed in Appendix A, OP Table 8.0) and patient age to identify
125 cases in the OP-23 outpatient population during the second quarter. From these 125 cases, the hospital
randomly selects a sample of 95 cases. Data for these 95 cases are collected and are then used to calculate the
hospital’s rate for each OP-23 outpatient measure. Forty of the 125 cases in the OP-23 outpatient population
are Medicare patients, and 25 of these cases were included in the sample.
The breakdown of data by month and Medicare/Non-Medicare:
Out patient Po pulatio n a nd Sam ple Size Subsets

Outpatient Population – Medicare patients
Outpatient Population – Non-Medicare patients
Total Outpatient Population Size
Outpatient Sample Size – Medicare patients
Outpatient Sample Size – Non-Medicare patients
Total Sample Size

April
10
20
30
5
15
20

May
15
30
45
10
25
35

June
15
35
50
10
30
40

Total
40
85
125
25
70
95

April
10
20
1
5
15

May
15
30
1
10
25

June
15
35
1
10
30

The following is transmitted for each month in the quarter:
Out patient Po pulatio n a nd Sam ple Size Subsets

Outpatient Population Size – Medicare only
Outpatient Population – Non-Medicare only
Outpatient Sampling Frequency (1 = sampled data)
Outpatient Sample Size –Medicare only
Outpatient Same Size – Non-Medicare only

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Hospital Outpatient Quality Measure Data Transmission
Introduction
This section of the manual is provided to highlight the unique data transmission specifications for hospital
outpatient measure data for the Centers for Medicare & Medicaid Services (CMS) and the Hospital Quality
Reporting (HQR) system.
This section is divided into three parts: Guidelines for Submission of Data, Transmission Data Element List,
and Transmission Data Processing Flow.
The Guidelines for Submission of Data section provides the user with the data standards required for
submission to HQR. It includes an overview of the data required for submission HQR, as well as the
Hospital Outpatient Clinical Data XML file layout and the Hospital Outpatient Population Data XML File
Layout.
The Transmission Data Element List describes the data elements that are either used to identify the hospital
and hospital outpatient measure set associated to the transmitted data or is calculated by the vendor using the
hospital’s patient-level data and measure results. These data elements are not used in the Population
Algorithms or Measure Algorithms.
The Transmission Data Processing Flow contains information regarding the order in HQR evaluates the
Hospital Outpatient measures.
IMPORTANT SUBMISSION ALERT!!
To submit Hospital Outpatient Quality Reporting (OQR) Program measures to CMS, files must meet
the specifications found only in this CMS manual. Otherwise, the files will be rejected for not meeting
CMS quality data submission requirements and providers may not receive the full payment update.
Guidelines for Submission of Data
Data collected for CMS are transmitted to the Hospital Quality Reporting (HQR) Data Submission File. All
data submitted are required to meet transmission requirements. The file layout requirements are included in
this section.
Submission Threshold
In order to reduce the burden on hospitals that treat a low number of patients but otherwise meet the
submission requirements for a particular quality measure, hospitals that have five or fewer cases in a quarter
(both Medicare and non-Medicare) for any measure set (i.e., Stroke) will not be required to submit patientlevel data for the entire measure set for that quarter.
Submission of Hospital Outpatient Clinical Data
Hospital outpatient clinical data are submitted to the HQR Data Submission File on a quarterly submission
schedule. All clinical data submitted to HQR must adhere to the Hospital Outpatient Clinical Data XML File
Layout specifications provided later in the transmission section.
Each case must have a separate XML file. For example, if you have 12 records that you have abstracted, you
must have 12 separate XML files. If you have abstracted more than one hospital outpatient measure set for a
patient encounter, then a separate XML file must be created for each hospital outpatient measure set. Each
hospital outpatient measure can only be abstracted once for the same medical record.

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Submission of Hospital Outpatient Population Data
CMS collects population size and declaration of sampling by hospital outpatient measure set on a quarterly
basis. For hospitals submitting the Hospital Outpatient Population Data, information may be submitted via an
XML file to HQR. All population data submitted to HQR must adhere to the Hospital Outpatient Population
Data XML File Layout specifications provided later in the transmission section. Each file may contain data
for only one provider.
Additional guidelines related to the submission of Hospital Outpatient Clinical Data and Hospital Outpatient
Population Data are outlined below.
Overview
The guidelines below are for the submission of Hospital Outpatient Clinical Data and Hospital Outpatient
Population Data to CMS.
Data Submission Verification
Prior to processing measure outcomes, all data will be verified according to the rules in the Data
Transmission section and the edits documents. Cases submitted to HQR that do not meet the requirements
outlined in these documents will be rejected.
Requirements for XML Tags and Associated Data
Do not put spaces between XML tags and associated data. Cases with inappropriate spaces will be rejected
from HQR.
Export File Character Limitations
Cases exported for submission to HQR may not have greater than 50 characters in the file name.
Missing Data Policy
All cases submitted to HQR must have all data required to calculate the measures. Files submitted, which are
missing data required to calculate measures (any case that would result in a Measure Category X
assignment), will be rejected from the warehouse. These cases should be reviewed by the provider, corrected,
and resubmitted prior to the submission deadline with an allowable value indicated for any data element that
was missing. Please refer to the Missing and Invalid Data Section for additional information.
Required Patient Identifiers Based on Payment Source
1. All cases submitted to HQR are required to include the Patient Identifier. Please refer to the Data
Dictionary for the definition of this data element.
Unique Record Key (What fields make a record unique?)
CMS Certification Number, Patient Identifier, Arrival Time, Outpatient Encounter Date, and Outpatient
Measure Set.
Principal and Other Diagnosis Codes
Effective March 1, 2007, the National Uniform Billing Committee implemented a Present on Admission
(POA) indicator for Principal and other Diagnosis codes. These POA indicators do not apply to outpatient
billing and should not be present on outpatient claims. Therefore, data submitted to HQR must have any
POA Indicator removed prior to submission. Failure to remove the indicator will result in cases being
rejected from HQR.
Hospital Outpatient Clinical Data XML File Layout
The XML file layout is divided into the following sections. Please refer to the Hospital Outpatient Clinical
Data XML file layout example for details on how the file elements are nested.
Submission – Parent element. This is a required element.
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The following attributes identify the initiative and file content of this element:
1. type – Describes the setting for which the data are being submitted (OUTPATIENT).
2. data – Describes the type of data being submitted (CLINICAL).
3. version – The version of the file layout (1.0).
4. action-code – Describes the intended action of the file being submitted (ADD or DELETE).
Note: In order to replace or delete an existing case utilizing the action–code ADD or DELETE, the
following data element values must match:
• CMS Certification Number (provider-id),
• Patient Identifier (patient-id),
• Arrival Time (arrival-time),
• Encounter Date (encounter-date), and
• Measure Set (encounter measure-set).
file-audit-data – Sub-element of “submission” used to identify file characteristics. This sub-element is
not required for the parent element “submission” and has no attributes.
The following identifies the file content on the “file-audit-data” sub-element. This file content is
not a required sub-element of “file-audit-data” and has attributes.
1. create-date – Sub-element of “file-audit-data” identifying the month, day, and year the file
was created.
2. create-time – Sub-element of “file-audit-data” identifying the hour and minutes representing the
time the file was created.
3. create-by – Sub-element of “file-audit-data” identifying the entity creating the file.
4. version – Sub-element of “file-audit-data” identifying the version of the file being submitted.
5. create-by-tool – Sub-element of “file-audit-data” identifying the tool used to create the file.
abstraction-audit-data – Sub-element of “submission” identifying characteristics of the abstraction.
This sub-element is not required for the parent element “submission” and has no attributes.
The following identifies the file content of the “abstraction-audit-data” sub-element. This file content is
not a required sub-element of “abstraction-audit-data” and has no attributes.
1. abstraction-date – Sub-element of “abstraction-audit-data” identifying the month, day, and year the
abstraction was created.
2. abstractor-id – Sub-element of “abstraction-audit-data” identifying the abstractor.
3. total-abstraction-time – Sub-element of “abstraction-audit-data” identifying the total time in
seconds required to abstract the information,
4. comment – Sub-element of “abstraction-audit-data” containing abstractor comments.
provider – Required sub-element of “submission” identifying provider, patient, and encounter
information. This sub-element and the file content listed below have no attributes.
1. provider-id – Required sub-element of “provider” identifying the provider’s CMS Certification
Number (CCN).
2. npi – Sub-element of “provider” identifying the provider’s National Provider Identifier (NPI). This is
not a required sub-element of “provider.”
patient – Required sub-element of “provider” identifying patient demographics. This sub-element has
no attributes.
1. first-name – Sub-element of “patient” providing the patient’s first name. This is not a required subelement of “patient” and has no attributes.
2. last-name – Sub-element of “patient” providing the patient’s last name. This is not a required subelement of “patient” and has no attributes.
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3. birthdate – Sub-element of “patient” providing the patient’s birthdate. This is a required subelement of “patient” and has no attributes.
4. sex – Sub-element of “patient” identifying the patient’s gender. This is a required sub-element of
“patient” and has no attributes.
5. race – Sub-element of “patient” identifying the patient’s race. This is a required sub-element of
“patient” and has no attributes.
6. ethnic – Sub-element of “patient” identifying the patient’s Hispanic ethnicity. This is a required
sub-element of “patient” and has no attributes.
7. postal-code – Sub-element of “patient” providing the patient’s ZIP code. This is a required subelement of “patient” and has no attributes.
encounter – Required sub-element of “patient” identifying the measure set and the patient’s abstracted
data. The following attributes identify the initiative and file content of this element:
1. measure set – Identifies the measure set for which the data were abstracted. The attribute of
“encounter” identifies the measure set.
2. encounter-date – Required sub-element of “encounter” identifying the month, day, and year the
patient encounter occurred. This sub-element has no attributes.
3. arrival-time – Required sub-element of “encounter” providing the patient’s arrival time. This subelement has no attributes.
4. patient-id – Required sub-element of “encounter” identifying the patient associated with the
abstracted data. This sub-element has no attributes.
detail – Required sub-element of “encounter” identifying the provider-abstracted information. The
following attributes of “detail” identify the abstracted information.
1. question-cd – Question being asked of the abstractor.
2. answer-cd – Answer identification code provided by the abstractor.
3. row-number – Sequential number identifying each response to a multiple answer question.
answer-value – Sub-element of “detail” providing the answer value text attributable to the answer-cd.
This is not a required sub-element of “detail” and has no attributes
Example of nested Hospital Outpatient Clinical XML file elements:
• submission (plus attributes type, data, version, and action-code)
o file-audit-data
▪ create-date
▪ create-time
▪ create-by
▪ version
▪ create-by-tool
o abstraction-audit-data
▪ abstraction-date
▪ abstractor-id
▪ total abstraction-time
▪ comment
o provider
▪ provider-id
▪ npi
▪ patient
➢ first-name
➢ last-name
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➢
➢
➢
➢
➢
➢

birthdate
sex
race
ethnic
postal-code
encounter (plus attribute measure-set)
• encounter-date
• arrival-time
• patient-id
• detail (plus attributes answer-code, question-cd, row-number)
o answer-value

To obtain further information about these questions and their possible attribute values, refer to the applicable
data element names (as identified in the first column, Question of the Clinical Data Elements worksheet) in
Section 2, Data.
Hospital Outpatient Population Data XML File Layout
The XML file layout is divided into the following sections. Please refer to the Hospital Outpatient
Population Data XML File Layout example for details on how the file elements are nested.
submission – Parent element. This element is required.
The following attributes identify the initiative and file content of this element.
1. type – Describes the setting for which the data are being submitted (OUTPATIENT).
2. data – Describes the type of data being submitted (POPULATION).
3. version – The version of the file layout (1.0).
4. action-code – Describes the intended action of the file being submitted (ADD).
Note: In order to replace an existing case utilizing the action-code ADD, the following data element
values must match.
• CMS Certification Number (provider-id),
• Time period start date (time-period start-date),
• Time period end date (time-period end-date), and
• Measure Set (encounter measure-set).
file-audit-data – Sub-element of “submission” used to identify file characteristics of the file. This subelement and the file content listed below are not required and have no attributes.
The following identify the file content of the “file-audit-data” sub-element:
1. create-date – Sub-element of “file-audit-data” identifying the month, day, and year the file was created.
2. create-time – Sub-element of “file-audit-data” identifying the hours and minutes representing the
time the file was created.
3. create-by – Sub-element of “file-audit-data” identifying the entity creating the file.
4. version – Sub-element of “file-audit-data” identifying the version of the file being submitted.
5. create-by-tool – Sub-element of “file-audit-data” identifying the tool used to create the file.
provider – Required sub-element of “submission” identifying encounter period and population data.
There are no attributes for this element.
1. provider-id – Sub-element of “provider” identifying the provider.
2. npi – Sub-element of “provider” identifying the provider’s National Provider Identifier (NPI). This is
not a required sub-element of “provider.”
time-period – Required sub-element of “provider” with attributes of delimiting the encounter period.
1. start-date – The starting month, day, and year for the encounters associated with the submitted data.
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2. end-date – The ending month, day, and year for the encounters associated with the submitted data.
Note: Dates in these fields should reflect the encounter time period related to the data being
submitted. Time period start and end dates must reflect full month increments and not be greater than
one month. Files submitted to HQR are required to contain three one-month time-periods comprising
the calendar quarter for which data are being submitted.
Example
If the Hospital Outpatient Population Data file is being submitted for the second quarter of 2024, the
file must contain the following time periods and appropriate associated data (including all data
elements as the Population Details section that follows):
April 2024
May 2024
June 2024
Files submitted with time periods that do not meet the above requirements will be rejected from
HQR.
encounter – Required sub-element of “time-period” identifying the measure set and the population. The
following attributes identify the file content of this element:
1. measure set – Identifies the outpatient measure set for which the case was abstracted.
2. population size– Required sub-element of “encounter” identifying population components. There
are no attributes for this element.
a. Medicare – Required sub-element of “population-size” identifying the numbers of Medicare
submissions. There are no attributes for this element.
b. non-Medicare – Required sub-element of “population-size” identifying the number of nonMedicare submissions. There are no attributes for this element.
3. patient-id – Required sub-element of “encounter” identifying the patient associated with the
abstracted data. This sub-element has no attributes.
4. sampling frequency – Required sub-element of “encounter” identifying if the provider is sampling.
This sub-element has no attributes.
5. sample-size – Required sub-element of “encounter” identifying sampled population sizes.
This sub-element has no attributes.
a. Medicare – Required sub-element of “sample-size” identifying the number of Medicare
submissions in the sample. There are no attributes for this element.
b. non-Medicare – Required sub-element of “sample-size” identifying the number of
non-Medicare submissions in the sample. There are no attributes for this element.
Example of nested Hospital Outpatient Population XML file elements:
The XML file elements are nested as follows:
• submission (plus attributes type, data, version, and action-code)
o file-audit-data
▪ create-date
▪ create-time
▪ create-by
▪ version
▪ create-by-tool
o provider
▪ provider-id
▪ npi
▪ time period (plus attributes start-date and end-date)
➢ encounter (plus attribute measure-set)
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➢ population-size
• Medicare
• non-Medicare
➢ sampling-frequency
➢ sample-size
• Medicare
• non-Medicare
Please refer to the Transmission Data Element List for further definition of the data elements. Please refer
to Hospital Outpatient Population Data XML File Layout for further information on details of the XML
file format. All data elements are based on encounters that occurred during the associated time period.
Measures Submitted Via a Web-Based Tool
Annual Data Submission Period: See the timeline posted to QualityNet.CMS.gov for these measures;
select Hospital Outpatient and then Data Submission in the drop-down menu.
Submission Instructions: Data entry will be achieved through the secure side of the Hospital Quality
Reporting (HQR) system via an online tool available to authorized users. After logging into the system using
HARP credentials:
1.
2.
3.
4.
5.
6.

Log into the Hospital Quality Reporting (HQR) system.
Select Data Submission under the Dashboard drop-down menu.
Select the Web-based Measures tab.
Click on Data Form.
Select the OQR Launch Data Form option.
View the Web-based measures and answer each of the required measure questions:
OP-22*, OP-29, OP-31**
* The Emergency Department Volume (EDV) is based on the volume of patients submitted by a
hospital as the Denominator used for the measure OP-22: Left without Being Seen.
** Data submission for OP-31 is voluntary
All measure data must be submitted by the deadline.

Data Submitted for Outpatient and Ambulatory Surgery Consumer Assessment (OAS CAHPS)
Hospitals contract with a CMS-approved OAS CAHPS Survey vendor to conduct the survey. A list of
approved survey vendors is available at the following link: https://oascahps.org/GeneralInformation/Approved-Survey-Vendors.
Beginning with CY 2024 reporting period, hospitals will be required to report quarterly data by the
submission deadlines provided on the OAS CAHPS website. Data deadlines are also available in Hospital
Outpatient Quality Reporting tab on QualityNet.cms.gov.
Data Submitted for Electronic Clinical Quality Measures (eCQM)
Beginning with CY 2024 reporting period, hospitals will be required to report one self-selected calendar
quarter for OP-40: ST-elevation myocardial infarction (STEMI) data. For CY 2025 reporting period the
requirement increases to two self-selected calendar quarters of data, followed by three required quarters in
CY 2026 and all four quarters beginning with CY 2027 reporting period. For more information on the
[

]

[

]

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adoption of OP-40 eCQM, please refer to the CY 2022 OPPS/ASC Final Rule, beginning on page 63837,
published in the Federal Register.
Refer to the Technical Specifications and Resources for the CMS Quality Reporting Document Architecture
(QRDA) Category I Implementation Guide for the applicable reporting period, measure specification
information, and program resources to support successful eCQM reporting on the eCQI Resource Center.
]

[

]

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Transmission Data Element List
These data elements are used either to identify the hospital and hospital outpatient measure set associated
with the transmitted data or are calculated by the vendor using the hospital’s patient-level data measure
results. These data elements are not used in the Outpatient Population Algorithms or Measure Algorithms.
Element Name
CMS Certification Number
National Provider Number (NPI)

Page #
5-10
5-11

Outpatient Measure Set

5-12

Outpatient Population Size – Medicare Only

5-13

Outpatient Population Size – Non-Medicare
Only

5-14

Outpatient Sample Size – Medicare Only

5-15

Outpatient Sample Size – Non-Medicare
Only

5-16

Outpatient Sampling Frequency

5-17

Collected For:
All Records
Optional for All Records
Used in transmission of the Hospital
Outpatient Population Data XML file and the
Hospital Outpatient Clinical Data XML file
Used in transmission of the Hospital
Outpatient Population Data XML file
Used in transmission of the Hospital
Outpatient Population Data XML file
Used in transmission of the Hospital
Outpatient Population Data XML file
Used in transmission of the Hospital
Outpatient Population Data XML file
Used in transmission of the Hospital
Outpatient Population Data XML file

IMPORTANT SUBMISSION ALERT!! 
To submit Hospital Outpatient Quality Reporting (OQR) Program measures to CMS, files must meet
the specifications found only in this CMS manual. Otherwise, the files will be rejected for not meeting
CMS quality data submission requirements and providers may not receive the full payment update.

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Data Element Name: CMS Certification Number
Collected For: All records
Definition: Hospital’s six-character acute care CMS Certification Number (CCN).
Suggested Data Collection Question: What is the hospital’s six-digit acute care CMS Certification
Number?
Format:
Length:
Type:
Occurs:

6
Character
1

Allowable Values:
Any valid six-character CMS Certification Number.
The first two digits are the numeric or alphanumeric state code. The third digit of zero represents an acute
facility. The third digit of “1” and fourth digit of “3” represents a Critical Access Hospital (CAH).
Notes for Abstraction: None
Suggested Data Sources: None
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: National Provider Identifier (NPI)
Collected For: Optional for all records
Definition: All Health Insurance Portability and Accountability Act of 1996 (HIPAA) covered healthcare
providers must obtain an NPI. The NPI may be provided in addition to the Medicare provider number.
Suggested Data Collection Question: What is the NPI for this provider?
Format:
Length:
Type:
Occurs:

10
Character
1

Allowable Values: Any valid 10-digit NPI number.
The 10th digit is a numeric check digit based off the first 9 digits.
Notes for Abstraction: None
Suggested Data Sources: UB-04, Field Location: 56
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

Hospital OQR Specifications Manual
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Data Element Name: Outpatient Measure Set
Collected For: Used in transmission of the Hospital Outpatient Population Data XML file and the Hospital
Outpatient Clinical XML file.
Definition: Indicates which hospital outpatient measure set is being transmitted for the hospital.
Suggested Data Collection Question: Not Applicable.
Format:
Length:
Type:
Occurs:

22
Character
1

Allowable Values: Refer to the Hospital Outpatient Clinical Data XML file and the Hospital Outpatient
Population Data XML file layouts located just after the Transmission Data Processing Flow portion of
this section.
Notes for Abstraction: None
Suggested Data Sources: Not Applicable
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

Hospital OQR Specifications Manual
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Data Element Name: Outpatient Population Size – Medicare Only
Collected For: Used in transmission of the Hospital Outpatient Population Data XML file.
Note: Refer to the Hospital Outpatient Population Data XML file layout located just after the Transmission
Data Processing Flow portion of this section.
Definition: Indicates the number of encounter records identified for a hospital with Medicare listed as a
payment source prior to the application of data integrity filters, measure exclusions, and/or sampling
methodology for the specified time period.
The data element is based on the hospital’s initial identification of Medicare encounter records for a hospital
outpatient measure set. Outpatient Population Size – Medicare Only includes all patients that are billed under
Medicare or Title 18. Medicare can be listed as a primary, secondary, tertiary, or lower on the list of payment
sources for the patient. In addition, patients who are participating as a member of a Medicare
HMO/Medicare Advantage are included in the Medicare counts (e.g., Medicare Blue, Humana Gold, Secure
Horizons, AARP, Coventry Advantra). This initial data pull utilizes administrative data such as ICD-10-CM
diagnosis codes, CPT® codes, outpatient encounter date, and birthdate.
For specific hospital outpatient measure set definitions, refer to the appropriate outpatient population
discussion in the Measure Information section of this manual.
Note: If the hospital’s data have been sampled, this field contains the population from which the sample was
originally drawn, not the sample size.
Suggested Data Collection Question: Not Applicable.
Format:
Length:
Type:
Occurs:

6
Numeric
One Outpatient Population Size – Medicare Only per hospital outpatient measure set

Allowable Values: 0 through 999,999
Notes for Abstraction: Outpatient Population Size – Medicare Only must contain the actual number of
patients in the population.
Suggested Data Sources: Not Applicable
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Outpatient Population Size – Non-Medicare Only
Collected For: Used in transmission of the Hospital Outpatient Population Data XML file.
Note: Refer to the Hospital Outpatient Population Data XML file layout located just after the Transmission
Data Processing Flow portion of this section.
Definition: Indicates the number of encounter records identified for a hospital with Medicare not listed as a
payment source prior to the application of data integrity filters, measure exclusions, and/or sampling
methodology for the specified time period.
The data element is based on the hospital’s initial identification of non-Medicare encounter records for a
hospital outpatient measure set. This initial data pull utilizes administrative data such as ICD-10-CM
diagnosis codes, CPT® codes, outpatient encounter date, and birthdate.
For specific hospital outpatient measure set definitions, refer to the appropriate outpatient population
discussion in the Measure Information section of this manual.
Note: If the hospital’s data have been sampled, this field contains the population from which the sample was
originally drawn, not the sample size.
Suggested Data Collection Question: Not Applicable.
Format:
Length:
Type:
Occurs:

6
Numeric
One Outpatient Population Size – Non-Medicare Only per hospital outpatient measure set

Allowable Values: 0 through 999,999
Notes for Abstraction: Outpatient Population Size – Non-Medicare Only must contain the actual number of
patients in the population.
Suggested Data Sources: Not Applicable
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

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Data Element Name: Outpatient Sample Size – Medicare Only
Collected For: Used in transmission of the Hospital Outpatient Population Data XML file.
Note: For more information, refer to the Population and Sampling Specifications section and the Hospital
Outpatient Population Data XML file layout located just after the Transmission Data Processing Flow
portion of this section.
Definition: Indicates the number of encounter records identified for a hospital with Medicare listed as a
payment source for a hospital to perform data abstraction on. This count is after the appropriate sampling
methodology, if any, has been applied for the specific time period.
Notes:
• If the hospital is sampling the hospital outpatient measure set, then the Outpatient Sample Size – Medicare
Only will be less than the Outpatient Population Size – Medicare Only for the hospital outpatient
measure set.
• If the hospital is not sampling the hospital outpatient measure set, then the Outpatient Sample Size –
Medicare Only will equal the Outpatient Population Size – Medicare Only for the hospital outpatient
measure set.
Suggested Data Collection Question: Not Applicable.
Format:
Length:
Type:
Occurs:

6
Numeric
One Outpatient Sample Size – Medicare Only per hospital outpatient measure set

Allowable Values: 0 through 999,999
Notes for Abstraction: When Outpatient Sampling Frequency = “N/A” because the hospital decided to not
submit patient-level data, Outpatient Sample Size – Medicare Only equals zero.
Suggested Data Sources: Not Applicable
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

Hospital OQR Specifications Manual
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Data Element Name: Outpatient Sample Size – Non-Medicare Only
Collected For: Used in transmission of the Hospital Outpatient Population Data XML file.
Note: For more information, refer to the Population and Sampling Specifications section and the Hospital
Outpatient Population Data XML file layout located just after the Transmission Data Processing Flow
portion of this section.
Definition: Indicates the number of encounter records identified for a hospital with Medicare not listed as a
payment source for a hospital to perform data abstraction on. This count is after the appropriate sampling
methodology, if any, has been applied for the specific time period.
Notes:
• If the hospital is sampling the hospital outpatient measure set, then the Outpatient Sample Size – NonMedicare Only will be less than the Outpatient Population Size – Non-Medicare Only for the hospital
outpatient measure set.
• If the hospital is not sampling the hospital outpatient measure set, then the Outpatient Sample Size – NonMedicare Only will equal the Outpatient Population Size – Non-Medicare Only for the hospital
outpatient measure set.
Suggested Data Collection Question: Not Applicable.
Format:
Length:
Type:
Occurs:

6
Numeric
One Outpatient Sample Size – Non-Medicare Only per hospital outpatient measure set

Allowable Values: 0 through 999,999
Notes for Abstraction: When Outpatient Sample Frequency = “N/A” because the hospital decided not to
submit patient-level data, Outpatient Sample Size – Non-Medicare Only equals zero.
Suggested Data Sources: Not Applicable
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

Hospital OQR Specifications Manual
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Data Element Name: Outpatient Sampling Frequency
Collected For: Used in transmission of the Hospital Outpatient Population Data XML file.
Note: Refer to the Population and Sampling Specifications section and the Hospital Outpatient Population
Data XML file layout located just after the Transmission Data Processing Flow portion of this section.
Definition: Indicates if the data being transmitted for a hospital have been sampled or represent an entire
population for the specified time period.
Suggested Data Collection Question: Not Applicable.
Format:
Length:
Type:
Occurs:

1
Character
One Outpatient Sampling Frequency per hospital outpatient measure set

Allowable Values:
1. Yes, the hospital is sampling.
2. No, the hospital is not sampling.
3. N/A, submission of patient-level data is not required.
Notes for Abstraction: Hospitals that have five or fewer cases (both Medicare and non-Medicare) for
any measures included in a measure topic (i.e., ED and Stroke) in a quarter will not be required to submit
patient-level data for the entire measure topic for that quarter. For example, hospitals with five or fewer
cases (both Medicare and non-Medicare) for the ED measure topic in a quarter will not be required to submit
patient-level data for that quarter.
Suggested Data Sources: Not Applicable
Inclusion Guidelines for Abstraction: None
Exclusion Guidelines for Abstraction: None

Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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Transmission Data Processing Flow
Introduction
This section contains information regarding the order in which the Hospital Quality Reporting (HQR) system
evaluates the hospital outpatient measures.
The data processing flow ensures that only valid data are used in the measure algorithms. Each case that is
rejected by the process will be listed on a report along with a brief description of the problem. HQR has
reports available to assist the submitter to determine how the data were processed. Please refer to
QualityNet.CMS.gov for more information about the CMS HQR system, data upload process, and these
reports.
Data Processing Flow
All data transmitted pass through the following process:
1. If appropriate, files are verified to be proper ZIP and XML files.
• If the files are invalid, reject the files(s) and stop processing.
• If the files are valid, continue processing.
Starting with this step, processing is per case (individual XML file):
2. Data are evaluated to ensure the quarter associated to the Outpatient Encounter Date is open for
data transmission.
• If the encounter date is missing or not valid per the calendar year, issue the appropriate critical error
message, reject the individual XML file, and stop processing.
• If the encounter date is valid per the calendar year, continue processing.
• If the Data Collection quarter is closed, issue the appropriate critical error message, reject the
individual XML file, and stop processing.
• If the Data Collection quarter is open, continue processing.
3. Data are evaluated to ensure the Outpatient Measure Set is expected from the submitter for the time
frame (Outpatient Encounter Date) in question. In addition, HQR verifies the data are expected for CMS
Certification Number.
• If the data are not expected, missing, or invalid, issue the appropriate critical error message, reject the
individual XML file, and stop processing.
• If the data are expected, continue processing.
4. Check the action-code.
• If the action-code = ADD, continue with step #5.
• If the action-code = DELETE, check submission data type.
• If the submission data type = POPULATION, issue appropriate critical message and reject file(s).
• If the submission data type = CLINICAL, continue with step # 13.
The following steps are performed if the record’s action-code = ADD:
5. The general data elements, as defined in the Data Dictionary section, are evaluated to ensure they exist
and contain valid allowable values. These data elements are generally required for all hospital outpatient
measures (with the exception of NPI).
• If any general data element is missing or invalid, issue the appropriate critical error message(s), reject
the individual XML file, and stop processing.
• If all general data elements exist and contain valid allowable values, continue processing.

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6. The Outpatient Population Algorithm associated to the Outpatient Measure Set is evaluated to ensure that
the data are in the population of the set. Refer to the appropriate Outpatient Measure Set Data Element
List for the algorithm.
• If the Outpatient Population Algorithm returns an Outpatient Population Reject Case Flag = Yes
(case is not in the outpatient population), reject the XML file and stop processing.
• If the Outpatient Population Algorithm returns an Outpatient Population Reject Case Flag = No
(case is not in the outpatient population), reject the XML file and stop processing.
7. The Outpatient Measure Set specific data elements are evaluated to ensure they contain valid
allowable values. This step does not evaluate for missing data because that process is performed
by the measure algorithms.
• If any Outpatient Measure Set specific data elements are invalid, issue the appropriate critical error
message(s), set the Edit Reject Case Flag = Yes, and continue processing with step #8.
• If all Outpatient Measure Set specific data elements contain valid allowable values, continue processing.
8. If appropriate for the Outpatient Measure Set, grid data elements are evaluated to ensure each row does
not contain missing data. This step does not ensure that the entire grid is empty because that process is
performed by the measure algorithms.
• If any row of the grid is missing data, issue the appropriate critical error message(s), set the Edit
Reject Case Flag = Yes, and continue processing with step #9.
• If all data elements exist in each row, continue processing.
9. Each XML file is evaluated for unexpected data. While a case may be in the population of more than one
outpatient measure set, each XML file is associated to only one set.
• If any data exist that are not expected for the Outpatient Measure Set, issue the appropriate critical
error message(s), set the Edit Reject Case Flag = Yes, and continue processing with step #10.
If no unexpected data for the Outpatient Measure Set exist, continue processing.
10. Evaluate the Edit Reject Case Flag.
• If the Edit Reject Case Flag = Yes, issue the appropriate critical error message(s), reject the individual
XML file, and stop processing.
• If the Edit Reject Case Flag = No, continue with step #11.
11. Execute each measure algorithm associated to the measures the hospital has selected for the Outpatient
Measure Set. Refer to the appropriate Measure Information Forms for the Outpatient Measure Set for the
measure algorithms.
• If any measure evaluates with a Measure Category Assignment = X, reject the XML file and stop
processing.
• If all measures evaluate with Measure Category Assignment = B, D, E, and/or Y, continue processing.
12. The case is accepted into the HQR system.
The following steps are performed if the record’s action-code = DELETE:
13. The remaining data elements that are part of the Unique Record Key are evaluated to ensure they exist
and contain valid allowable values. These data elements are required for all Outpatient Measure Sets.
• If any Unique Record Key data element is missing or invalid, reject the XML file and stop processing.
• If all Unique Record Key data elements exist and contains valid allowable values, continue processing.
14. The database is checked to see if a record with the same Unique Record Key already exists.
• If the case does not already exist in the database, then the transmitted DELETE record is rejected.
• If the record already exists in the database, it is deleted.
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Hospital Outpatient Clinical Data XML File Layout v17.0
Element Name

XML Attribute/
question-cd

Data Type

Field
Size

Occurs

Answer Code

Answer Value

Applicable
Measure(s)

Programming Notes

Date Last Known Suggested Data Collection Question: What was the date associated with the time at which the patient was last known to be well or at his or her baseline state of health?
Well
DATELASTWELL
Date
10
1
(MM-DDUser Entered (MM-DD-YYYY)
OP-23
YYYY)
Must be a valid
date:
MM (01-12)
DD (01-31)
YYYY (20xx)
UTD

Unable to Determine

Discharge Code Suggested Data Collection Question: What was the patient’s discharge code from the outpatient setting?
DISCHGCODE
Alphanumeric
2
1
1
Home
OP-18, OP-23
2
Hospice - Home
3
Hospice - Health Care Facility
4a
Acute Care Facility - General Inpatient Care
4b
Acute Care Facility - Critical Access Hospital
4c
Acute Care Facility - Cancer Hospital or Children's Hospital
4d
5
6
7
8
ED Departure
Date

Suggested Data Collection Question: What is the date the patient departed from the emergency department?
EDDEPARTDT
Date
10
1
(MM-DDUser Entered (MM-DD-YYYY)
YYYY)
Must be a valid
date:
MM (01-12)
DD (01-31)
YYYY (20xx)
UTD

ED Departure
Time

Acute Care Facility - Department of Defense or Veteran's
Administration
Other Health Care Facility
Expired
Left Against Medical Advice /AMA
Not Documented or Unable to Determine (UTD)

Unable to Determine

Suggested Data Collection Question: What is the time the patient departed from the emergency department?
EDDEPARTTM
Time
5
1
(HH:MM)
User Entered (HH:MM)
(Military format with or without colon, HH:MM)

5d_HOPClinXMLFileLayout_v17.0.xlsx
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OP-18

OP-18

1

Hospital Outpatient Clinical Data XML File Layout v17.0
Element Name

E/M Code

XML Attribute/
question-cd

Data Type

Field
Size

Occurs

Answer Code
UTD

Answer Value
Unable to Determine

Suggested Data Collection Question: What was the E/M Code documented for this outpatient encounter?
EMCODE
Alphanumeric
5
1
E/M code
E/M code

Last Known Well Suggested Data Collection Question: Is there documentation that the date and time of last known well was witnessed or reported?
LSTKNWELL
Alphanumeric
1
1
Y
Yes
N
No
Physician 1

Suggested Data Collection Question: What is the first physician identifier?
PHYSICIAN_1
Character
50
1
Up to 50 letters, User Entered
numbers, and/or
special characters
can be entered.
Only the
following special
characters will be
allowed: ~ ! @ #
$%^*()_+{
}|:?' -=[]\;`
. , / and space

Physician 2

Suggested Data Collection Question: What is the second physician identifier?

5d_HOPClinXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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Applicable
Measure(s)

OP-18, OP-23

Programming Notes

Refer to Appendix A,
OP Table 1.0.

OP-23

Optional Data
Element

2

Hospital Outpatient Clinical Data XML File Layout v17.0
Element Name

XML Attribute/
question-cd
PHYSICIAN_2

Data Type
Character

Field
Size
50

Occurs
1

Answer Code

Answer Value

Up to 50 letters, User Entered
numbers, and/or
special characters
can be entered.
Only the
following special
characters will be
allowed: ~ ! @ #
$%^*()_+{
}|:?' -=[]\;`
. , / and space

Applicable
Measure(s)
Optional Data
Element

Payment Source Suggested Data Collection Question: What is the patient’s source of payment for this outpatient encounter?
PMTSRCE
Alphanumeric
1
1
1
Source of payment is Medicare.
2
Source of payment is Non-Medicare.

All Records

ICD-10-CM
Principal
Diagnosis Code

OP-18, OP-23

Suggested Data Collection Question: What was the ICD-10-CM code selected as the principal diagnosis for this record?
PRINDX
Alphanumeric
8
1
ICD-10-CM
Any valid diagnosis code as per the CMS ICD-10-CM
Diagnosis code master code table (Code Descriptions in Tabular Order):
-without decimal https://www.cms.gov/Medicare/Coding/ICD10/index.html
point or dot

Head CT or MRI Suggested Data Collection Question: Was a head CT or MRI scan ordered by the physician during the emergency department visit?
Scan Order
SCANORD
Alphanumeric
1
1
Y
Yes
N
No
Head CT or MRI Suggested Data Collection Question: What is the date the earliest head CT or MRI scan interpretation was completed or reported?
Scan
SCANINTDT
Date
10
1
(MM-DDUser Entered (MM-DD-YYYY)
Interpretation
YYYY)
Date
Must be a valid
date:
MM (01-12)
DD (01-31)
YYYY (20xx)

5d_HOPClinXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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Programming Notes

Refer to Appendix A,
ICD-10-CM and CPT
Code Tables

OP-23

OP-23

3

Hospital Outpatient Clinical Data XML File Layout v17.0
Element Name

XML Attribute/
question-cd

Data Type

Field
Size

Occurs

Answer Code
UTD

Answer Value
Unable to Determine

Head CT or MRI Suggested Data Collection Question: What is the time the earliest head CT or MRI scan interpretation was completed or reported?
Scan
SCANINTTM
Time
5
1
(HH:MM)
User Entered (HH:MM)
Interpretation
(Military format with or without colon, HH:MM)
Time
UTD
Unable to Determine
Time Last
Known Well

Suggested Data Collection Question: At what time was the patient last known to be well or at his or her prior baseline state of health?
TMLSTKWNWELL
Time
5
1
(HH:MM)
User Entered (HH:MM)
(Military format with or without colon, HH:MM)
UTD
Unable to Determine

5d_HOPClinXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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Applicable
Measure(s)

Programming Notes

OP-23

OP-23

4

Modified to include changes effective with 2024 ENCOUNTER DATES
XML Element

Attributes

Description

Data Element

Valid Values

Data Type

Field Size

Data
Required

A header is optional at the beginning of each XML file as follows:

Opening tag is required.
type
data
version
action-code

Describes the setting for which data is being submitted.
Describes the type of data being submitted.
The version of the file layout.
Describes the intended action of the file being submitted

Sub-element of the submission
data element

Opening tag for file audit
data

Note: This tag and the entire section are optional in the XML document. If submitted, this tag contains no data.
Required if sub-elements are included.

N/A
N/A
N/A
N/A

OUTPATIENT
CLINICAL
1.0
DELETE, ADD

Character
Character
Character
Character

20
20
20
20

Yes
Yes
Yes
Yes

(MM-DD-YYYY)
Must be a valid date:
MM (01-12)
DD (01-31)
YYYY (20xx)

Date

10

No

HH:MM (Military format with or without colon)

Time

5

No

Up to 50 letters, numbers, and/or special
Character
characters can be entered. Only the following
special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ` - = [ ]
\ ; ‘ . , / and space

50

No

Character

20

No

Up to 50 letters, numbers, and/or special
Character
characters can be entered. Only the following
special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ` - = [ ]
\ ; ‘ . , / and space

50

No

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Sub-element of the file audit data Example with data:
05-10-2007
element
None

The month, day, and year the file was created

N/A

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Sub-element of the file audit data Example with data:
23:01
element
None

The hour and minutes representing the time the file was created.

N/A

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Sub-element of the file audit data Example with data:
VendorA
element
None

The entity who created the file

N/A

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Sub-element of the file audit data Example with data:
1.0
element
None
The version of the file being submitted
N/A

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Sub-element of the file audit data Example with data:
OPPS 1.3
element

None

Tool used to create the XML file

Closing tag for file audit
data

Note: This tag and the entire section are optional in the XML document, but if the opening tag of is provided, then this closing tag is required as well.

Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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N/A

XML Tags

5

Modified to include changes effective with 2024 ENCOUNTER DATES
XML Element

Attributes

Description

Data Element

Sub-element of the submission
data element

Opening tag for
abstraction audit data

Sub-element of the abstraction
audit data element

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
05-10-2007
None

The month, day, and year the XML file was abstracted

N/A

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
JSMITH

Sub-element of the abstraction
audit data element

None
User id of who abstracted this encounter.
N/A
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
1125
None

Data Type

Field Size

Data
Required

Note: This tag and the entire section are optional in the XML document. If submitted, this tag contains no data.
Required if sub-elements are included.

Sub-element of the abstraction
audit data element

Sub-element of the abstraction
audit data element

Valid Values

Total time it took for the encounter to be abstracted.

N/A

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
Information about the abstraction
None
Comments about the abstraction.
N/A

(MM-DD-YYYY)
Must be a valid date:
MM (01-12)
DD (01-31)
YYYY (20xx)

Date

10

No

N/A

Character

20

No

Time in seconds

Number

22

No

4000

No

Text
Character
Up to 4000 letters, numbers, and/or special
characters can be entered. Only the following
special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ` - = [ ]
\ ; ‘ . , / and space

Closing tag for abstraction Note: This tag and the entire section are optional in the XML document, but if the opening tag of is provided, then this closing tag is required
audit data
as well.

Sub-element of the submission
data element

Opening tag for provider

Sub-element of the provider
element

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
125789

Sub-element of the provider
element

Note: This tag is required in the XML document, however, it contains no data.

None

Used to identify the provider

CMS Certification
Number
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
1257894658

Valid 6 character CMS Certification Number

Character

6

Yes

None

National Provider Identifier as assigned by CMS

Valid 10 digit NPI Number

Character

10

No

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National Provider
Identifier (NPI)

XML Tags

6

Modified to include changes effective with 2024 ENCOUNTER DATES
XML Element

Attributes

Opening tag for patient
Sub-element of the provider data
element

Sub-element of the patient
element

Sub-element of the patient
element

Sub-element of the patient
element

Field Size

Data
Required

Note: This tag is required in the XML document, however, it contains no data.

The patient’s first name

First Name

The patient’s last name

Last Name

The month, day, and year the patient was born

Birthdate

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
1
None
The patient's documented sexual orientation and/or gender
Sex
identity
NOTE: There are 6 valid values and they can select all that apply.
Can occur up to 5 times but the field size for each occurance is
"1." If value "6" is selected then no other value should be selected.
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
2
None
Documentation of the patient’s race.
Race
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
Y
None

Sub-element of the patient
element

Data Type

Patient's First Name
Character
Up to 30 letters, numbers, and/or special
characters can be entered. Only the following
special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ` - = [ ]
\ ; ‘ . , / and space

30

No

Patient's Last Name
Character
Up to 60 letters, numbers, and/or special
characters can be entered. Only the following
special characters will be allowed:
~ ! @ # $ % ^ * ( ) _ + { } | : ? ` - = [ ]
\ ; ‘ . , / and space

60

No

(MM-DD-YYYY)
Must be a valid date:
MM (01-12)
DD (01-31)
YYYY

Date

10

Yes

1,2,3,4,5,6

Alphanumeric

1

Yes

1,2,3,4,5,7

Character

1

Yes

Y,N

Character

1

Yes

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
08-06-1964
None

Sub-element of the patient
element

Valid Values

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
Smith
None

Sub-element of the patient
element

Data Element

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
Ann
None

Sub-element of the patient
element

Description

Documentation that the patient is of Hispanic or Latino ethnicity

Hispanic Ethnicity

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
50266

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XML Tags

7

Modified to include changes effective with 2024 ENCOUNTER DATES
XML Element

Attributes

Description

Data Element

None

The postal code of the patient's residence. For the United States Postal Code
zip codes the hyphen is implied. If the patient is determined to not
have a permanent residence, then the patient is considered
homeless.

Sub-element of the patient
element

Opening tag for measure
set

Example with data:

measure-set

The code for the measure set submitted.

Sub-element of the encounter

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example:
04-02-2008
None

Sub-element of the encounter

Outpatient
Encounter Date

Field Size

(5 or 9 digit without hyphen, "homeless", or "Non- Character
US")

9

Yes

ED-THROUGHPUT
STROKE

Character

22

Yes

(MM-DD-YYYY)
Must be a valid date:
MM (01-12)
DD (01-31)
YYYY (20xx)

Date

10

Yes

HH:MM (Military format with or without colon or
can equal UTD)

Time

5

Yes

Up to 40

Yes

See
specific
element
for field
size limits

Yes

Data
Required

The earliest documented time (military time) the patient arrived at
the outpatient or emergency department.

Arrival Time

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
74185296374185296385
None

Sub-element of the encounter

The month, day, and year the patient was seen in the hospital
outpatient department.

Data Type

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example:
15:14
None

Sub-element of the encounter

Measure Set

Valid Values

Identifier used to identify the patient at the hospital

Patient Identifier

Up to 40 letters, numbers, and/or characters.
Character
NOTE: The only characters that will be allowed
are spaces, hyphens, dashes, and under-scores.

Since this is the opening element, the closing tag for this element will be at the end of the record.
Attributes describe the element and are included within the opening and closing <>
Example of Yes/No question (refer to this workbook’s Clinical Data Elements tab for valid answer codes):
For discharges 4/1/2008 and forward:

Example of multiple choice question (refer to this workbook’s Clinical Data Elements tab for valid answer codes):

Example of a user-entered code:

answer-code

ID number of the answer

Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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Not a data element Refer to this workbook’s Clinical Data
itself; each possible Elements tab for valid values.
answer has its own
unique ID

XML Tags

Character

8

Modified to include changes effective with 2024 ENCOUNTER DATES
XML Element

Attributes

Description

Data Element

Valid Values

Data Type

Field Size

question-cd

The field name of the question

Not a data element Refer to this workbook’s Clinical Data
itself; each data
Elements tab for valid values.
element is a
question code

Character

20

Yes

row-number

Used to group answers together for multi-row, multi-column
answers

Not a data element; 0-20 Depending on the number of rows allowed
per question.
used for grouping
answers only
i.e. Surgery Antibiotic Name would have rownumber 0 for the first antibiotic, 1 for the second
antibiotic, and so on.

Integer

2

Yes

Not a data element Place the answer text here.
itself; each answer Examples:
has a value
Yes
No
04-01-2008 23:00
Note: All Dates & Times in
this field should be
formatted as MM-DD-YYYY
and military format with or without colon for
HH:MM.

Character

Sub-element of detail

The answer value
The description of the answer-code
Example: No

Closing tag for detail

Closing tag for encounter Note: This tag is required in the XML document, however, it contains no data.

Closing tag for patient

Note: This tag is required in the XML document, however, it contains no data.

Closing tag for provider

Note: This tag is required in the XML document, however, it contains no data.

Closing tag for submission Note: This tag is required in the XML document, however, it contains no data.

Data
Required

Default to 0. For
mulitiple answer
options, add 1 to
the row number
for each
additional answer

2000

No

Note: This tag is required in the XML document, however, it contains no data.

Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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XML Tags

9

Modified to include changes effective with 2024 ENCOUNTER DATES OQR v17.0

XML Element

Attributes

Description

Data
Element

Valid Values

Data
Type

Field Data
Size Required

N/A

OUTPATIENT

Character

20

Yes

N/A

POPULATION

Character

20

Yes

N/A
N/A

1.0
ADD

Character
Character

20
20

Yes
Yes

A header is optional at the beginning of each XML file as follows:

Opening tag
type
data
version
action-code

Sub-element of the submission data
element

Sub-element of the file-audit-data
element

Opening tag for
file data

Sub-element of the file-audit-data
element

Note: This tag and the entire section are optional in the XML document. If submitted, this
tag contains no data.

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
04-13-2007
None

Sub-element of the file-audit-data
element

Describes the setting for which
data is being submitted.
Describes the type of data being
submitted.
The version of the file layout.
Describes the intended action of
the file being submitted

The month, day, and year the file
was created

N/A

MM-DD-YYYY
(Must be a valid date)
MM (01-12)
DD (01-31)
YYYY (20xx)

Date

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
23:01
None
The hour and minutes representing N/A
HH:MM
Time
the time the file was created.
(Military format with or
without colon
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
jsmith

5e_HOPPopXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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POP XML OQR v17.0

10

No

5

No

1

Modified to include changes effective with 2024 ENCOUNTER DATES OQR v17.0

XML Element

Sub-element of the file-audit-data
element

Sub-element of the file-audit-data
element

Attributes

Description

Data
Element

None

The entity who created the file

N/A

Valid Values

Data
Type

Up to 50 leters,
Character
numbers, and/or special
characters can be
entered. Only the
following special
characters will be
allowed: ~ ! @ # $ % ^
*()_+{}l:?'-=[]
\ ; ` . , / and space

Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
1.0
None
The version of the file being
N/A
Character
submitted
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
Tool A
None
Tool used to create the file
N/A
Up to 50 leters,
Character
numbers, and/or special
characters can be
entered. Only the
following special
characters will be
allowed: ~ ! @ # $ % ^
*()_+{}l:?'-=[]
\ ; ` . , / and space
Closing tag for
file data

Opening tag for

Sub-element of the submission data provider
element

Field Data
Size Required
50

No

20

No

50

No

Note: This tag and the entire section are optional in the XML document, but if the opening
tag of is provided, then this closing tag is required as well.
Note: This tag is required in the XML document, however, it contains no data.

5e_HOPPopXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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POP XML OQR v17.0

2

Modified to include changes effective with 2024 ENCOUNTER DATES OQR v17.0

XML Element

Attributes

Data
Element

Description

Valid Values

Data
Type

Field Data
Size Required

Each element must have a closing tag that is the same as the opening tag but with a forward slash.

Sub-element of the provider element Example with data:
125789
None

CMS
Valid 6 character CMS Character
Certification Certification Number
Number
Each element must have a closing tag that is the same as the opening tag but with a forward slash.

Sub-element of the provider element Example with data:
1257894658
None
National Provider Identifier as
National
Valid 10 digit NPI
Character
assigned by CMS
Provider
Number
Identifier
(NPI)

Sub-element of the provider data
element

Sub-element of the time-period
element

Sub-element of the encounter

Used to identify the provider

6

Yes

10

No

MM-DD-YYYY
Date
(Must be a valid date)
Must be start date of
month
MM-DD-YYYY
Date
(Must be a valid date)
Must be end date of the
month corresponding to
the start-date

10

Yes

10

Yes

ED-THROUGHPUT
STROKE

22

Yes

Example with data:

start-date

The starting month, day, and year Not a data
for the encounters associated with element
the submitted data

end-date

The ending month, day, and year Not a data
for the encounters associated with element
the submitted data

Example with data:

measure-set
Used to identify which of the
measure sets the case was
abstracted for
Opening tag for Sampling determination
population size

5e_HOPPopXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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POP XML OQR v17.0

Measure Set

Character

3

Modified to include changes effective with 2024 ENCOUNTER DATES OQR v17.0

XML Element

Attributes

Data
Element

Description

Valid Values

Data
Type

Field Data
Size Required

Each element must have a closing tag that is the same as the opening tag but with a forward slash.

Sub-element of the population-size Example with data:
200
None
Number of medicare submissions Outpatient
Numeric
0-999999
Population
Size Medicare only

6

Yes

Each element must have a closing tag that is the same as the opening tag but with a forward slash.

Sub-element of the population-size Example with data:
175
None
Number of non-medicare
Outpatient
Numeric
0-999999
submissions
Population
Size - NonMedicare only

6

Yes

1

Yes

Sub-element of the encounter

Closing tag for population size
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
1
None

Sub-element of the encounter

Sub-element of the sample-size

Sampling determination

Outpatient
Sampling
Frequency

1- Sampling
Character
2 - Not Sampling
3 - N/A, submission of
patient-level data is not
required

Opening tag for Note: This tag is required in the XML document, however, it contains no data.
sample size
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
175

5e_HOPPopXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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POP XML OQR v17.0

4

Modified to include changes effective with 2024 ENCOUNTER DATES OQR v17.0

XML Element

Sub-element of the sample-size

Data
Element

Attributes

Description

None

Number of medicare submissions
in sample

Valid Values

Data
Type

Outpatient
Numeric
0-999999
Sample sizeMedicare
Only
Each element must have a closing tag that is the same as the opening tag but with a forward slash.
Example with data:
150
None
Number of non-medicare
Outpatient
Numeric
0-999999
submissions in sample
Sample sizeNonMedicare
Only
Closing tag for
sample size
Closing tag for
measure-set
Closing tag for
time-period
Closing tag for
provider
Closing tag for
submission

Field Data
Size Required
6

Yes

6

Yes

Note: This tag is required in the XML document, however, it contains no data.
Note: This tag is required in the XML document, however, it contains no data.
Note: This tag is required in the XML document, however, it contains no data.
Note: This tag is required in the XML document, however, it contains no data.
Note: This tag is required in the XML document, however, it contains no data.

5e_HOPPopXMLFileLayout_v17.0.xlsx
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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POP XML OQR v17.0

5

Alphabetical Tools and Resources List
Element Name
Arrival Time-Guidelines
ED Departure Time-Guidelines
OP-29: Appropriate Follow-up Interval for Normal
Colonoscopy in Average Risk Patients-Template
OP-29: Appropriate Follow-up Interval for Normal
Colonoscopy in Average Risk Patients-Algorithm
OP-29: Appropriate Follow-up Interval for Normal
Colonoscopy in Average Risk Patients-Denominator
Codes
OP-29: Appropriate Follow-up Interval for Normal
Colonoscopy in Average Risk Patients-Fact Sheet

Page #
6-1
6-2
6-4
6-5
6-6
6-7

Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
CPT® only copyright 2023 American Medical Association. All rights reserved.

6-0

Hospital OQR Program Arrival Time: Guidelines
The guidelines are to be applied when abstracting all measures included in the Hospital OQR Program
(OP-18, and OP-23):
Remember, the definition of Arrival Time is “the earliest documented time (military time) the patient arrived
at the outpatient or emergency department.”
• If the time of the arrival is unable to be determined from medical record documentation, select “UTD.”
• Review the only acceptable sources to determine the earliest time the patient arrived at the ED or
observation. Documentation outside of the only acceptable sources list should not be referenced (such as
ambulance record, physician office record, or H&P).
• “Emergency department record” includes any documentation from the time period that the patient was an
ED patient, e.g., ED face sheet, ED consent/authorization for treatment forms, ED/outpatient
registration/sign-in forms, triage record, ED physician orders, ECG reports, telemetry rhythm strips,
laboratory reports, x-ray reports, etc.
• If the time on the face/registration sheet is not labeled “arrival,” “registration,” or “admit” time, or is
labeled simply “time,” then the time can be considered a nondescript time and should not be used as
Arrival Time.
• Arrival Time can be the time the patient first sees triage, registration, or the volunteer who puts her/his
name on a page with a time. It does not have to be a professional who documents the arrival time.
• Do not use a time stamp unless it is clear that it is used specifically for patient arrival time.
• Do not use pre-printed times on a vital sign graphic record.
• Do not use a stamp or label that has a consistent time on every page.
Note the following frequently asked questions:
Question: If the patient enters the ED, is signed in by a volunteer at 1950, and then sits in the waiting room
until called by triage at 2012, what is the correct Arrival Time?
Answer: The earliest documented time the patient arrived in the ED: 1950.
Question: The patient arrives by ambulance and has an ECG, IV, and O2 that are all recorded as 1300. A nurse
note documents 1255. A note in the ambulance run sheet indicates that the patient arrived at 1240. What is the
correct Arrival Time?
Answer: The earliest documented time the patient arrived in the ED: 1255. You cannot use the ambulance run
sheet as a time of arrival; you may only use the run sheet (if you must) to substantiate that the patient was not in
the ED at 1240.
Question: The record indicates a non-labeled/non-descript time of 1840 on the registration sheet; the time is not
labeled “Admit” or “Registered;” there is a time of 1850 on the triage note; an ECG time of 1845 is noted; and a
lab collection time of 0000 is noted. What is the Arrival Time?
Answer: The earliest documented time the patient arrived in the ED: 1845. Unless there is other documentation
to substantiate that the patient was present at 0000, ignore that time and use the next earliest time: 1845. The
1840 time is not valid to use since it was not labeled “arrival,” registration,” or “admit.”

Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
CPT® only copyright 2023 American Medical Association. All rights reserved.

6-1

Hospital OQR ED Departure Time: Guidelines
When abstracting ED Departure Time for OP-18 (Median Time from ED Arrival to ED Departure for
Discharged ED Patients), remember the intent of abstraction “…is to capture the latest time at which the patient
was receiving care in the emergency department, under the care of emergency department services, or
awaiting transport to service/care.”
Source: Alphabetical Data Element List and Data Dictionary, ED Departure Time data element, and General
Abstraction Guidelines, Medical Record Documentation
•

Do use the later departure time if two departure/discharge times are noted.

•

Do use the time of the observation order written by the physician/advanced practice nurse (APN)/
physician’s assistant (PA) for patients who are placed into observation.

•

Do not use:
o Coding Summary
o Physician’s Discharge Summary
o ED record released from holding time
o Chart closed time
o Off the tracking board time
o Report called time
o Disposition time
o Discharge instruction time

•

Do not use any time that cannot be substantiated in the medical record as direct patient care being provided.
For example, if there is a departure time of 2015 and a note from the physician or nurse written at 2200 with
no other information available that the patient was still in the facility, the departure time would be 2015.

•

Do not use note times or late entries for medication administration or vital signs if they are later than the ED
Departure Time.

•

Do not use the time the discharge order was written because it may not represent the actual time of departure.

•

Do use:
o Discharge time (if it is listed on the disposition sheet)
o Release time
o Out time
o Gone time
o Checkout time
o Transport documented time
o Event log, registration sheet, transfer record, etc. (if a discharge time is noted and the document is part
of the permanent medical record)
o Transfer time
o Order for observation status time
o Any other synonym that can easily be understood to mean “Departure” or “Discharge”

Note the following frequently asked questions:
Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
CPT® only copyright 2023 American Medical Association. All rights reserved.

6-2

Question: The patient was admitted to “Observation” from the ED. The nurse documents that the patient
physically left the ED at 1440. The order for “Observation” was written at 1700. What time should be
abstracted for ED Departure Time?
Answer: If the order for “Observation” is written after the patient departed the ED, select the time the patient
physically left the ED. In this example, abstract 1440 as the ED Departure Time.
Question: ED Discharge Time is documented on the face sheet at 1400. A nursing note is documented as,
“EMS at bedside” at 1422 and medication administration noted at 1428. What would be the appropriate ED
Departure Time?
Answer: Because there is substantial documentation to support that the patient was in the ED after the
documented Discharge Time and there is no additional documented time of ED departure, it cannot be
determined when the patient physically left the ED. Enter “UTD” for ED Departure Time. Medication
administration times are not acceptable for establishing the ED Departure Time.
Question: A nurse’s note indicates when the patient was discharged from the ED. No other care is documented
beyond that time. There is also an electronic time entered after the documented ED Departure Time that states
“patient removed from the system.” Which documentation should be used for abstracting the ED Departure Time?
Answer: The intent is to capture the latest time the patient was receiving care in the emergency department. In
this example, there is a documented discharge time. The documented discharge time from the nurse’s note
would be used to abstract ED Departure Time. Documentation that the patient was removed from system is
insufficient for abstracting ED Departure Time because it does not provide substantial documentation that the
patient physically departed the ED.

Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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6-3

Template for Collecting OP-29 Data
Answer the questions in the table below to determine whether colonoscopy patients fall into the OP-29 measure,
keeping in mind that OP-29 looks forward to recommendations for future care.
OP-29: Appropriate Follow-up Interval for Normal Colonoscopy in Average Risk Patients
Measure Criteria
1. Patient had a screening colonoscopy, without biopsy or
polypectomy, and is ≥ 50 to ≤ 75 years of age on date
of encounter
a) Documentation of medical reason(s) for not
recommending at least a 10-year follow-up interval
(e.g., above average risk patient or inadequate prep
or if age is documented as a medical reason)
2. Recommended follow-up interval of at least 10
years for repeat colonoscopy is documented in
colonoscopy report

Circle
One
Yes

Denominator/Numerator
Determination

No

Include in denominator population,
continue to 1(a)
Exclude from denominator population

Yes
No

Exclude from denominator population
Continue to Question 2

Yes
No

Include in numerator population
Exclude from numerator population

Hospital OQR Specifications Manual
Encounter dates 01-01-24 (1Q24) through 12-31-24 (4Q24) v17.0
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6-4

OP-29: Appropriate Follow-Up Interval for Normal Colonoscopy in Average Risk Patients
Numerator Statement: Patients who had a recommended follow-up interval of at least 10 years for repeat
colonoscopy documented in their colonoscopy report
Denominator Statement: All patients ≥ 50 to ≤ 75 years of age receiving screening colonoscopy without biopsy
or polypectomy

Start

Colonoscopy screening performed

N

Documentation of medical
reason(s) for not
recommending at least a
10-year follow-up interval
(e.g., above average risk
patient or inadequate prep)

Patient aged ≥ 50
to ≤ 75 years

Y

Y
Documentation of a
recommended
follow-up interval
of at least 10 years
for repeat
colonoscopy
documented in the
colonoscopy report

Follow-up
interval
of at least
10 years

Biopsy or
polypectomy
performed

Y

N
N
N
Follow-up
interval
of at least
10 years

Exclude from
the
numerator

Exclude from
the
measure
population

Include in the
denominator
population

End

Y

Exclude from
the
measure
population

Include in the
numerator
population

Adapted from algorithm provided by
clinical services group/HCA; January 2020

For use with encounter dates 010124-123124;
Specifications Manual version 17.0
6-5

Measure OP-29: Appropriate Follow-Up Interval for Normal Colonoscopy in
Average Risk Patients
Denominator Codes
The following codes are derived from the OP-29 Measure Information Form (MIF) in the Specifications
Manual on QualityNet at www.qualitynet.cms.gov.
Denominator criteria always include both:
•
•

Patients aged ≥ 50 and < 75on date of encounter
Z12.11: Colonoscopy screen with anesthesia
and one of the following:

•
•
•

44388: Colonoscopy through stoma; diagnostic
45378: Diagnostic colonoscopy/screening colonoscopy for non-Medicare patients
G0121: Screening colonoscopy for other Medicare patients
without any of the following modifiers:

•
•
•
•
•
•
•
•

52: Reduced Services—Under certain circumstances a service or procedure is partially reduced
or eliminated at the physician’s discretion
53: Discontinued Procedure—Under certain circumstances, the physician may elect to
terminate a surgical or diagnostic procedure
73: Discontinued Out-Patient Hospital/Ambulatory Surgery Center (ASC) Procedure Prior
to the Administration of Anesthesia—Due to extenuating circumstances or those that threaten the
well-being of the patient
74: Discontinued Out-Patient Hospital/Ambulatory Surgery Center (ASC) Procedure After
Administration of Anesthesia—Due to extenuating circumstances or those that threaten the
well-being of the patient
Z83.71: Family history of colonic polyps
Z86.010: Personal history of colonic polyps
Z80.0: Family history of malignant neoplasm of gastrointestinal tract
Z85.038: Personal history of malignant neoplasm of large intestine

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Measure OP-29: Appropriate Follow-Up Interval for Normal Colonoscopy
in Average Risk Patients Fact Sheet
Measure Description:

Percentage of patients aged 50 to 75 years of age receiving a screening
colonoscopy without biopsy or polypectomy who had a recommended
follow-up interval of at least 10 years for repeat colonoscopy documented in
their colonoscopy report.

Denominator Statement: All patients aged 50 to 75 years of age receiving screening colonoscopy
without biopsy or polypectomy.
Numerator Statement:

Patients who had a recommended follow-up interval of at least 10 years for
repeat colonoscopy documented in their colonoscopy report.

For the purposes of determining this measure, do:
•
•

•

Use the final colonoscopy report only to abstract the recommended follow-up interval. If your
facility utilizes another report that is equivalent to or contains the final colonoscopy report, utilize
this report for abstraction.
Use any medical reason, such as a diagnosis, symptom, or condition that is documented in the
medical record, to exclude a case from the denominator population only when the recommended
follow-up interval is less than 10 years. Please note that you must have both an interval of less than
10 years and the medical reason documented in order to use this as an exclusion from the
denominator. The following are some examples:
o Above average risk patient
o Inadequate prep
o Family history of colon cancer
o Diverticulitis documented in the medical record
Note: Please remember that there is no comprehensive list of medical reasons.
Exclude a case if there is documentation indicating no follow-up colonoscopy is needed or
recommended and patient's age is ≥66 years old, or life expectancy <10 years.

For the purposes of determining this measure, do not:
•
•

Use records with CPT/HCPCS modifiers 52, 53, 73, or 74.
Use time frames, such as “5–10 years,” “many,” “prn,” or “when symptomatic,” since they are not
acceptable terms for the recommended follow-up interval of at least 10 years.

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Appendix B
Glossary of Terms
accuracy (of data) The extent to which data are free of identifiable errors.
administrative/billing data (data source) Data that reflect the content of discharge abstracts (for example,
demographic information on patients such as age, sex, ZIP code; information about the episode of care such
as admission source, length of stay, charges, discharge status; and diagnostic and procedural codes). Namely,
the Uniform Hospital Discharge Data Set and the Uniform Bill of the Health Care Financing Administration
(UB-04) provide specifications for the abstraction of administrative/billing data.
algorithm An ordered sequence of data element retrieval and aggregation through which numerator and
denominator events or continuous variable values are identified by a measure. The algorithms are depicted
using flowcharting symbols.
allowable values A list of acceptable responses for a data element.
ANSI X12 The American National Standards Institute’s standard for transmitting data electronically, or
electronic data interchange (EDI).
binary outcome Events or conditions that occur in one or two possible states often labeled 0 or 1. Such data
are frequently encountered in medical research. Common examples include dead or alive, and improved or
not improved.
central tendency A property of the distribution of a variable, usually measured by statistics such as the
mean, median, and mode.
clinical measures Measures designed to evaluate the processes or outcomes of care associated with the
delivery of clinical services; allow for intra- and inter-organizational comparisons to be used to continuously
improve patient health outcomes; may focus on the appropriateness of clinical decision-making and
implementation of these decisions; must be condition-specific, procedure-specific, or address important
functions of patient care.
continuous variable An aggregate data measure in which the value of each measurement can fall
anywhere along a continuous scale (e.g., the time in minutes from emergency department arrival to
administration of fibrinolytics).
continuous variable data elements Those data elements required to construct the measure as stated in the
section labeled “Continuous Variable Statement.”
contraindication A factor or condition that may render the administration of a drug or agent or the
performance of a procedure or other practice inadvisable, improper, and/or undesirable.
Current Procedural Terminology (CPT®) code A listing of descriptive terms and identifying codes for
reporting medical services and procedures performed by physicians.
critical access hospital (CAH) Hospitals that offer limited services to include round-the-clock emergency
care services and are, by definition, located more than 35 miles from a hospital or another critical access
hospital, or are certified by the state as being a necessary provider of healthcare services to residents in the
area. They maintain no more than 25 beds for acute (hospital-level) inpatient care and are subject to a 96-hour
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Appendix B-1

average length of stay for acute care patients. For CAHs with swing bed agreements, any of its beds may be
used to furnish either inpatient acute care or swing bed services. Hospitals certified by the Secretary of the
Department of Health and Human Services (HHS) as critical access hospitals are eligible for cost-based
reimbursement from Medicare if they meet a specific set of federal Conditions of Participation (COPs).
data collection The act or process of capturing raw or primary data from a single or number of sources; also
called “data gathering.”
data collection effort The availability and accessibility of the required data elements, the relative effort
required, and associated cost of abstracting or collecting the data.
data editing The process of correcting erroneous or incomplete existing data, exclusive of data entry
input edits.
data element A discrete piece of data, such as patient birthdate or principal diagnosis. See also denominator
data elements, numerator data elements, and continuous variable data elements.
data entry The process by which data are transcribed or transferred into an electronic format.
data point The representation of a value for a set of observations or measurements at a specific time interval
(e.g., perioperative mortality rate for the month of June 2019).
data quality The accuracy and completeness of measure data on performance in the context of the analytic
purposes for which they will be used.
data sources The primary source document(s) used for data collection (for example, billing or administrative
data, encounter form, enrollment forms, and medical record). See also administrative data, clinical survey,
medical record, patient survey, provider data, and registry/log data.
data transmission The process by which data are electronically sent from one organization to another.
denominator The lower part of a fraction used to calculate a rate, proportion, or ratio. Also, the population
for a rate-based measure.
denominator data elements Those data elements required to construct the denominator.
discrete variable See rate-based measure.
electronic data interchange (EDI) An instance of data being sent electronically between parties, normally
according to predefined industry standards.
electrocardiogram (ECG) A graphic tracing of the heart’s electrical impulses.
emergency department A department that provides care for emergency medical conditions on an urgent
basis without requiring a previously scheduled appointment.
episode of care (EOC) A patient or case-level record submitted to the database.
Evaluation and Management (E/M) codes Codes used to report evaluation and management services
provided in the physician’s office, or in an outpatient or other ambulatory facility.
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Appendix B-2

excluded populations Detailed information describing the populations that should not be included in the
indicator. For example, specific age groups, ICD-10-CM procedure or diagnostic codes, or certain time
periods could be excluded from the general population drawn upon by the indicator.
fibrinolytic therapy Administration of a pharmacological agent intended to cause lysis of a thrombus
(destruction or dissolution of a blood clot). Refer to Appendix C, Table 1.3 for a listing of fibrinolytic agents.
format Specifies the character length of a specific data element; the type of information the data element
contains numeric, decimal number, date, time, or alphanumeric; and the frequency with which the data
element occurs.
general data elements Data elements that must be collected by hospitals for each patient record. These data
are patient demographic data, hospital identifiers, and patient identifiers.
healthcare organization (HCO) The business entity which is participating in a performance measurement
system (e.g., healthcare organization level data describes information about the business entity).
hospital An institution primarily engaged in providing, by or under the supervision of physicians, inpatient
diagnostic and therapeutic services or rehabilitation services.
hospitalist A doctor who primarily takes care of patients when they are in the hospital. This doctor will take
over your care from your primary doctor when you are in the hospital, keep your primary doctor informed
about your progress, and will return you to the care of your primary doctor when you leave the hospital.
ICD-10-CM codes A two-part classification system in current use for coding patient medical information
used in abstracting systems and for classifying patients into diagnosis-related groups (DRGs). The first part
is a comprehensive list of diseases with corresponding codes compatible with the World Health
Organization’s list of disease codes. The second part contains procedure codes independent of the
disease codes.
included populations Detailed information describing the population(s) that the indicator intends to
measure. Details could include such information as specific age groups, diagnoses, ICD-10-CM diagnostic
and procedure codes, CPT® codes, enrollment periods, insurance and health plan groups, etc.
Inpatient Prospective Payment System (IPPS) Rule Section 1886(d) of the Social Security Act (the Act)
sets forth a system of payment for the operating costs of acute care hospital inpatient stays under Medicare
Part A (Hospital Insurance) based on prospectively set rates. This payment system is referred to as the
inpatient prospective payment system (IPPS). Under the IPPS, each case is categorized into a diagnosisrelated group (DRG). Each DRG has a payment weight assigned to it, based on the average resources used to
treat Medicare patients in that DRG.
invalid data The data element value falls outside of the range of defined allowable values. Refer to the
Missing and Invalid Data section for further information.
mean A measure of central tendency for a continuous variable measure. The mean is the sum of the values
divided by the number of observations.
measure information form Tool to provide specific clinical and technical information on a measure. The
information contained includes performance measure name, description, rationale,
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Appendix B-3

numerator/denominator/continuous variable statements, included populations, excluded populations, data
elements, risk adjustment, sampling, data accuracy, and selected references.
measure-related feedback Measure-related information on performance that is available, on a timely
basis, to organizations actively participating in the performance measurement system for use in the
organization’s ongoing efforts to improve patient care and organizational performance. Feedback can be
reflective of information within individual organizations (intra-organizational) and/or across organizations
(inter-organizational).
measure-specific data elements Data elements used by one specific measure or several measures in one
specific measure set.
median The value in a group of ranked observations that divides the data into two equal parts.
missing data No values present for one or more data elements that are required for calculating and/or
risk adjusting a national hospital quality measure. Refer to the Missing and Invalid Data section for
further information.
mode The most frequently occurring response for that data element.
module A set of measures under a common group/topic area (e.g., fibrinolytic module).
monthly data point The representation of a value for a set of observations or measurements for a
calendar month.
multivariate analysis The analysis of the simultaneous relationships among variables.
national quality measure A standardized performance measure that meets the Centers for Medicare &
Medicaid Services (CMS) evaluation criteria, has precisely defined specifications, can be uniformly
embedded in extant systems, and has standardized data collection protocols to permit uniform
implementation by healthcare organizations and permit comparisons of healthcare organization performance
over time through the establishment of a national comparative database.
nosocomial infection An infection acquired by a patient in a healthcare organization, especially a hospital.
This infection is not present or incubating before admission to a hospital.
numerator The upper portion of a fraction used to calculate a rate, proportion, or ratio.
numerator data elements The upper portion of a fraction used to calculate a rate, proportion, or ratio. For
the Hospital Outpatient Quality Reporting (OQR) Program, it represents the portion of the denominator that
satisfies the conditions of the performance measure.
observed rate The observed rate is the measure rate that is based on a hospital’s aggregated data for the
reporting period. This is calculated as the number of measure numerator cases for the reporting period
divided by the number of denominator cases. Observed rates are used to measure hospital performances.
Outpatient Prospective Payment System (OPPS) Rule A prospective payment system (PPS) under
Medicare for hospital outpatient services, certain Part B services furnished to hospital inpatients that have no
Part A coverage, and partial hospitalization services furnished by community mental health centers. All
services paid under the PPS are classified into groups called Ambulatory Payment Classifications or APCs.
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Appendix B-4

A payment rate is established for each APC. Depending on the services provided, hospitals may be paid for
more than one APC for an encounter.
outpatient record (data source) Data obtained from the records or documentation maintained on a patient
in the hospital outpatient department setting (for example, hospital-based outpatient surgery, hospital-based
clinic, emergency department). Includes automated and paper medical record systems.
parenteral Not through the alimentary canal but by injection through some other route, such as
subcutaneous, intramuscular, intraorbital, intracapsular, intraspinal, intrasternal, intravenous, etc.
patient factor A variable describing some characteristic of individual patients that may influence healthcarerelated outcomes. Patient factors can include:
•
•
•
•
•

complications Conditions arising after the beginning of healthcare observation and treatment that
modifies the course of the patient’s health or illness and the intervention/care required.
co-morbidities Pre-existing diseases or conditions.
severity of illness classifications Seriousness or stage of illness at the time of the beginning of
healthcare observation or treatment (for example, AJCC staging for oncology patients, NYHA class for
cardiovascular patients).
functional status Factors related to health status including physical functioning, role disability due to
physical-health problems, bodily pain, general health perceptions, vitality, social functioning, role
disability due to emotional problems, and general mental health.
patient demographics Age, ethnicity, gender, location, etc.

patient-level data Collection of data elements that depict the healthcare services provided to an individual
(patient). Patient-level data are aggregated to generate hospital-level data and comparison group data.
percentile A value on a scale of 100 that indicates the percentage of a distribution that is equal to or
below it.
performance measure A quantitative tool (for example, rate, ratio, index, percentage) that provides an
indication of an organization’s performance in relation to a specified process or outcome. See the process
measure and the outcome measure.
performance measurement system An entity consisting of an automated database(s) that facilitates
performance improvement in healthcare organizations through the collection and dissemination of process
and/or outcome measures of performance. Measurement systems must be able to generate internal
comparisons of organization performance over time, and external comparisons of performance among
participating organizations at comparable times.
performance measure-related feedback See measure-related feedback.
predicted value The statistically expected response or outcome for a patient after the risk adjustment model
has been applied and the patient’s unique set of risk factors have been considered.
process A measure used to assess a goal directed, interrelated series of actions, events, mechanisms, or
steps, such as measure of performance that describes what is done to, for, or by patients, as in performance
of a procedure.

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Appendix B-5

provider data (data source) Data obtained from other provider-generated records that are not necessarily
contained in the medical record (e.g., pharmacy patient medication profiles, nursing care plans).
randomization A technique for selecting or assigning cases such that each case has an equal probability of
being selected or assigned. It is done to stimulate chance distribution, reduce the effects of confounding
factors, and produce unbiased statistical data.
range A measure of the spread of a data set; the difference between the smallest and largest observation.
ratio A relationship between two counted sets of data, which may have a value of zero or greater. In a ratio,
the numerator is not necessarily a subset of the denominator (e.g., pints of blood transfused to number of
patients discharged).
registry/log data (data source) Data obtained from local, regional, or national disease or procedure-related
registries, data obtained from the healthcare organization’s daily recordings (logs). Examples of such data
include tumor, trauma, and cardiology registries. Examples of log data include infusion therapy, central line
infection, and labor and delivery logs.
regression coefficients Synonym for regression weight which is derived from statistical modeling and
expresses the change in a patient’s response or outcome corresponding to a unit of change in the appropriate
explanatory variable (i.e., patient risk factor).
relevance The applicability and/or pertinence of the indicator to its users and customers.
reliability The ability of the indicator to identify the events accurately and consistently it was designed to
identify across multiple healthcare settings.
reporting period The defined time period which describes the patient’s end-of-service.
reperfusion Re-establishing blood flow in an obstructed coronary artery. It may be accomplished with
thrombolytic therapy or percutaneous coronary intervention.
risk-adjusted rate A rate that considers differences in case mix to allow for more valid comparisons
between groups.
sampling frequency If a hospital chooses to sample, they may sample data on either a monthly or quarterly
basis. Refer to the “Sample Size Requirements” discussion in the Population and Sampling Specifications
section for further information.
sampling method Describes the process used to select a sample. Sampling approaches for national hospital
quality measures are simple random sampling and systematic sampling. Refer to the “Sampling Approaches”
discussion in the Population and Sampling Specifications section for further information.
sample size The number of individuals or patients included in a study, usually chosen so that the study has a
particular statistical power of detecting an effect of a particular size. Refer to the “Sample Size
Requirements” discussion in the Population and Sampling Specifications section for further information.
score A rating, usually expressed as a number, and based on the degree to which certain qualities or
attributes are present (e.g., Glasgow coma, ASA scores).
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Appendix B-6

severity The degree of biomedical risk or mortality of medical treatment.
simple random sample A process in which a sample of data is selected from the total population in
such a way that every case has the same chance of being selected and that the sample size is met. Refer
to the “Sampling Approaches” discussion in the Population and Sampling Specifications section for
further information.
standard deviation A measure of variability that indicates the dispersion, spread, or variation in
a distribution.
strata See stratified measure.
stratification A form of risk adjustment, which involves classifying data into strata based on one or more
characteristics, variables, or other categories.
stratification-based approach for risk adjustment The process of dividing or classifying subgroups
known as strata to facilitate more valid comparisons. For example, a measure’s outcome may be divided into
type of surgery-specific categories or strata.
stratified measure A performance measure that is classified into a number of strata to assist in analysis and
interpretation. The overall or un-stratified measure evaluates all the strata together. The stratified measure or
each stratum consists of a subset of the overall measure.
stratum See stratified measure.
structure measure A measure that assesses whether organizational resources and arrangements are
in place to deliver healthcare, such as the number, type, and distribution of medical personnel, equipment,
and facilities.
systematic random sampling A process in which the starting case is selected randomly, and the next cases
are selected according to a fixed interval that is based upon the number of cases in the population. For
example, the starting case is the second patient that arrives at the hospital. This patient and every subsequent
fifth patient becomes part of the random sample until the sample size is reached. Refer to the “Sampling
Approaches” discussion in the Population and Sampling Specifications section for further information.
test cases Fictitious patient-level data composed of clinical data elements that yield an expected result for a
specific core measure algorithm.
thrombolytic therapy See fibrinolytic therapy.
transmission schedule The schedule of dates on which data are expected to be transmitted.
unable to be determined (UTD) Each data element that is applicable per the algorithm for each of the
measures within a topic must be “touched” by the abstractor. While there is an expectation that all data
elements are collected, it is recognized that in certain situations information may not be available (i.e., dates,
times, codes, etc.). If, after due diligence, the abstractor determines that a value is not documented or is not
able to determine the answer value, the abstractor must select “Unable to Determine (UTD)” as the answer.

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Appendix B-7

validation The process by which the integrity and correctness of data are established. Validation processes
can occur immediately after a data item is collected or after a complete set of data are collected. CMS chartlevel validation will validate the data at several levels. There are consistency and internal edit checks to
assure the integrity of the submitted data, there are external edit checks to verify expectations about the
volume of the data received, and there will be chart-level audits to assure the reliability of the submitted data.
Information on these procedures is available on http://www.qualitynet.org.
validity Ability to identify opportunities for improvement in the quality of care, demonstration that the
indicator uses results in improvements in outcomes and/or quality of care.
variance Equal to the square of the standard deviation.
verification The process used to ensure consistent implementation of core measure algorithms specified in
this manual across disparate measurement systems.
Selected Sources:
•
•
•
•
•
•
•
•
•

Babbie ER. The Practice of Social Research, 2nd edition, Belmont, CA: Wadsworth Publishing
Company, 1979.
Current Procedural Terminology (CPT®), 4th edition, American Medical Association, 2007.
Everitt, BS. The Cambridge Dictionary of Statistics, Cambridge University press, 1998.
Iezonni LI, Foley SM, Heeran T, Daley J, Duncan CC, Fisher ES, Hughes J. “A Method for Screening
the Quality of Hospital Care Uning Administrative Data: Preliminary Validation Results, “Quality
Review Bulletin, November, 1992, 361-370.
Lexikon Second Edition, Oakbrook Terrace, IL: Joint Commission on Accreditation of Healthcare
Organizations, 1998.
McHorney CA, Kosinsk, M, and Ware Jr. JE. “Comparisons of the Cost and Quality of Norms for theSF36 Health Survey Collected by Mail Versus Telephone Interview: Results From a National Survey,”
Medical Care, 32, (1994), 551-567.
Leon-Chisen N. ICD-10-CM and ICD-10-PCS Coding Handbook, 2014 Ed. with Answers Amer
Hospital Assn; 2013.
ORYX® Technical Implementation Guide, Oakbrook Terrace, IL: Joint Commission on Accreditation of
Healthcare Organizations, current.
2006 Accreditation Manual(s), Oakbrook Terrace, IL: Joint Commission on Accreditation of Healthcare
Organizations, 2005.

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Appendix B-8

Appendix C
Medication Tables
Medication tables are not meant to be inclusive lists of all available therapeutic agents. Discrepancies must
be reported.
Index
Number
Table 1.2
Table 1.3

Name
Warfarin
Fibrinolytic Agents

Page
Appendix C-4
Appendix C-4

OP Table 1.2 Warfarin
Medication Name
Warfarin Sodium
Coumadin
Jantoven
Warfarin
OP Table 1.3 Fibrinolytic Agents
Medication Name
Activase
Alteplase
Anisoylated Plasminogen-Streptokinase Activator Complex (APSAC)
Kabikinase
Retavase
Reteplase
rPA (RPA)
Streptase
Streptokinase
Tenecteplase
Tissue plasminogen activator
TNKase
tPA (TPA)

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Appendix C-1

Appendix D: Preview Section
The Preview Section provides information on new measures. The information provided in this section should
not be programmed or submitted. The measure(s) identified in this section are not currently collected.
Hospitals that are excluded from payment under the OPPS are not required to report on the Hospital OQR
Program measures but may do so on a voluntary basis.

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Appendix D-1