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Section 1c: FHIR®
Section 3: Implementation Guides

HL7 FHIR® Implementation Guide: Using CQL, Edition 2

DESCRIPTION

The intent of this implementation guide is to support the use of CQL with FHIR in general. It is a universal realm specification and is intended to be broadly applicable to any use case that involves libraries or expressions of CQL evaluating against FHIR resources, including:

  • Library profiles to support packaging of CQL (and compiled CQL, or ELM) as FHIR Library resources
  • Evaluation support profiles to facilitate the representation of structured information about a logic library, as well as the result of evaluating a logic library
  • CQL Evaluation Service capability statement
  • ModelInfo-related profiles to facilitate configuration of ModelInfo for FHIR implementation guides

 

See the specification at http://hl7.org/fhir/uv/cql/STU2

ALTERNATIVE NAMES

HL7 FHIR® Implementation Guide: Using CQL, Edition 2 may also go by the following names or acronyms:

"HL7 FHIR® IG: Using CQL with FHIR, E1",CQL

BENEFITS

  • Supports consistent use of Clinical Quality Language throughout the various clinical reasoning use cases it supports, including quality measurement, decision support, cohort definition, registry and case reporting, and structured data capture.

IMPLEMENTATIONS/CASE STUDIES

  • Smile Digital Health
  • MITRE
  • Optum
  • NCQA
  • Firely

DEVELOPMENT BACKGROUND

This implementation guide is the result of extracting common aspects of that support to a universal realm, broadly applicable implementation guide that supports the use of CQL with Fast Healthcare Interoperability Resources (FHIR). Future versions of those implementation guides should consider referencing the conformance and guidance established here.

RELATED DOCUMENTS

HL7 FHIR® Implementation Guide: Using CQL, Edition 2

STU DOCUMENTS

HL7 FHIR® Implementation Guide: Using CQL, Edition 2 See the standard at http://hl7.org/fhir/uv/cql/STU2. (Submit Feedback on STU)
HL7 FHIR® Implementation Guide: Using CQL With FHIR, Edition 1 See the standard at http://hl7.org/fhir/uv/cql/STU1. Expiration May 2026

TOPICS

  • Clinical Quality
  • Decision Support
  • Public Health

BALLOT TYPE

  • STU

STATUS DATE

2025-07-08

RESPONSIBLE WORK GROUP

Clinical Decision Support

PRODUCT TYPE

  • Implementation Guide

STAKEHOLDERS

  • Clinical Decision Support Systems Vendors
  • EHR, PHR Vendors
  • Health Care IT Vendors
  • Healthcare Institutions
  • Local and State Departments of Health
  • Quality Reporting Agencies
  • Regulatory Agency
  • Standards Development Organizations (SDOs)

FAMILY

  • FHIR

CURRENT STATE

  • Active

REALM

  • Universal