Welcome to the Clinical Quality Language (CQL) Knowledge Hub - a comprehensive resource for learning and working with CQL across different roles and use cases.
All documentation is maintained in the wiki:
Clinical Quality Language (CQL) is a high-level, domain-specific language focused on clinical quality and targeted at measure and decision support artifact authors. It is designed to be human-readable while enabling precise expression of clinical logic for quality measures, decision support, and public health reporting.
View Full Specification | Explore the Wiki
This repository and wiki are supported, in large part, by the Digital Quality Implementers Community (DQIC). The DQIC is a collaborative consensus-based effort to develop, advance, and standardize tools and platforms that make digital quality measurement possible. Our vision is to attract the leading experts and organizations in the sector to enable rapid advancement of a consensus agreed upon approach to a quality enablement layer for the country to ensure consistency across disparate solutions.
| Role | For | Find |
|---|---|---|
| 📊📈 Measure Developer Hub | Authoring quality measures and clinical decision support | Language specs, best practices, development patterns, testing tools |
| ⚙️🔧 Engine Developer Hub | Implementing CQL engines and building infrastructure | Implementation guides, architecture, conformance, integration specs |
| 👤💼 Clinical Data Solution Implementers Hub | Using CQL in IGs like Da Vinci and HEDIS | Quick starts, reading guides, common patterns, IG resources |
"I need to..."
- ✍️ Write CQL for quality measures → Measure Developer Hub
- ⚙️ Build a CQL engine or infrastructure → Engine Developer Hub
- 📊 Implement HEDIS® digital measures → NCQA® Digital HEDIS® Community Hub
- 🏥 Use CQL in my EHR/payer system → Clinical Data Solution Implementers
- 🆕 Just learning about CQL → Getting Started Guide
- 🔍 Work with terminology servers → Using CQL With Terminology Servers
Need help deciding or new to CQL? Check out our Getting Started Guide
CQL Specification • GitHub Organization • Community Chat
Maintained by the Digital Quality Implementers Community and CQ Framework Team
CQL is a high-level, domain-specific language focused on clinical quality and care delivery. It is designed to be human-readable while enabling precise expression of clinical logic for quality measures, decision support, and public health reporting.
This is a proof-of-concept wiki for organizing CQL resources by audience. Feedback and contributions are welcome!
- Open an issue for suggestions
- Join the discussion on chat.fhir.org #cql
This documentation is provided under [appropriate license - to be determined].
Thanks to the Digital Quality Implementers Community. Built on the foundation of the excellent CQL Formatting and Usage Wiki maintained by the CQL community.