dQM CMS Content Implementation Guide
2026.1.0 - CI Build

dQM CMS Content Implementation Guide, published by cqframework. This guide is not an authorized publication; it is the continuous build for version 2026.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/cqframework/dqm-content-cms-2026/ and changes regularly. See the Directory of published versions

Measure:

Official URL: https://madie.cms.gov/Measure/StratificationPatientExample Version: 2026.1.0
Draft as of 2026-08-19 Computable Name:
Metadata
Version 2026.1.0
Status Draft
Measure Scoring http://hl7.org/fhir/measure-scoring#proportion
Contents Metadata
Contents
Measure Rates (Groups)
Supplemental Data
Measure Logic
Population Criteria
Logic Definitions
Terminology
Dependencies
Data Requirements
Measure Rates (Groups)
Measure Rate (Group) (ID: group-1)
Basis boolean
Initial Population ID: initial-population
Criteria: Initial Population
Denominator ID: denominator
Criteria: Denominator
Numerator ID: numerator
Criteria: Numerator
Stratifier Code: Criteria-based Age Range Stratifier, 0 to 20 years
Stratifier Code: Criteria-based Age Range Stratifier, 21 to 40 years
Stratifier Code: Criteria-based Age Range Stratifier, 41+ years
Stratifier Code: Value-based Gender and Age Range Stratifier
Supplemental Data Elements
Measure Logic
Primary Library Stratification Patient Example
Population Criteria
Measure Rate (Group) (ID: group-1)
Initial Population 
define "Initial Population":
  true
Definition
Denominator 
define "Denominator":
  Patient.active is true
Definition
Numerator 
define "Numerator":
  exists ("Well-Visit Encounter")
Definition
Stratifier 
/* Criteria-based Stratifiers */

define "Stratifier P0Y--P21Y":
  Patient.ageInYearsAt(end of "Measurement Period") between 0 and 20
Definition
Stratifier 
define "Stratifier P21Y--P41Y":
  Patient.ageInYearsAt(end of "Measurement Period") between 21 and 40
Definition
Stratifier 
define "Stratifier P41Y--P9999Y":
  Patient.ageInYearsAt(end of "Measurement Period") >= 41
Definition
Logic Definitions
Logic Definition Library Name: StratificationPatientExample 
define "Well-Visit Encounter":
  [Encounter] E
    where E.status = 'finished'
      and E.period ends during day of "Measurement Period"
Logic Definition Library Name: StratificationPatientExample 
define "Numerator":
  exists ("Well-Visit Encounter")
Logic Definition Library Name: StratificationPatientExample 
define "Stratifier P21Y--P41Y":
  Patient.ageInYearsAt(end of "Measurement Period") between 21 and 40
Logic Definition Library Name: StratificationPatientExample 
define "Denominator":
  Patient.active is true
Logic Definition Library Name: StratificationPatientExample 
/* Criteria-based Stratifiers */

define "Stratifier P0Y--P21Y":
  Patient.ageInYearsAt(end of "Measurement Period") between 0 and 20
Logic Definition Library Name: StratificationPatientExample 
define "Initial Population":
  true
Logic Definition Library Name: StratificationPatientExample 
define "Stratifier P41Y--P9999Y":
  Patient.ageInYearsAt(end of "Measurement Period") >= 41
Logic Definition Library Name: PatientCommon 
/*
@description: Returns the age in years of the patient, as of the given date
@comment: This function returns the number of whole calendar years between the patient birth 
date and the given date. Regardless of whether the patient has a birthTime, the calculation is
performed using only the birth date. If the given date has a time component, it is ignored, on 
the grounds that birth time is almost universally not considered when determining age in years.
*/
define fluent function ageInYearsAt(patient Patient, asOf DateTime):
  CalculateAgeInYearsAt(Patient.birthDate, date from asOf)
Logic Definition Library Name: FHIRHelpers 
define function ToString(value EncounterStatus): value.value
Logic Definition Library Name: FHIRHelpers 
/*
@description: Converts the given [Period](https://hl7.org/fhir/datatypes.html#Period)
value to a CQL DateTime Interval
@comment: If the start value of the given period is unspecified, the starting
boundary of the resulting interval will be open (meaning the start of the interval
is unknown, as opposed to interpreted as the beginning of time).
*/
define function ToInterval(period FHIR.Period):
    if period is null then
        null
    else
        if period."start" is null then
            Interval(period."start".value, period."end".value]
        else
            Interval[period."start".value, period."end".value]
Logic Definition Library Name: FHIRHelpers 
define function ToDate(value date): value.value
Logic Definition Library Name: FHIRHelpers 
define function ToBoolean(value boolean): value.value
Terminology
Terminology None
Dependencies
Dependency Description: FHIR model information
Resource: http://hl7.org/fhir/uv/cql/Library/FHIR-ModelInfo|4.0.1
Canonical URL: http://hl7.org/fhir/uv/cql/Library/FHIR-ModelInfo|4.0.1
Dependency Description: Library FHIRHelpers
Resource: http://hl7.org/fhir/uv/cql/Library/FHIRHelpers|4.0.1
Canonical URL: http://hl7.org/fhir/uv/cql/Library/FHIRHelpers|4.0.1
Dependency Description: Library PatientCommon
Resource: Patient Common
Canonical URL: https://madie.cms.gov/Library/PatientCommon
Dependency Description: Library FHIRHelpers
Resource: http://hl7.org/fhir/uv/cql/Library/FHIRHelpers|4.0.1
Canonical URL: http://hl7.org/fhir/uv/cql/Library/FHIRHelpers|4.0.1
Data Requirements
Data Requirement Type: Encounter
Profile(s): Encounter
Must Support Elements: status, period
Data Requirement Type: Patient
Profile(s): Patient
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