Current Version of the QDM in Use
The most recent version of the QDM is QDM v5.6. It was published January 2021 and lists all changes from QDM v5.5 Guidance Update in section 7.1 and highlights all data model changes throughout the document with red text.
Previous QDM Version Information
For reference, visit the Standards and Tools Versions Chart for more detail on versions used to create and/or support the implementation of the specific reporting/performance period specifications.
Visit the QDM FAQs page to review common questions and answers on QDM.
Find QDM Known Issues on the Clinical Quality Language (CQL) Formatting and Usage Wiki.
Last Updated: Jun 17, 2025