Back to top
Top
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Health IT Developer/Vendor

Value Set Authority Center (VSAC)

eCQM Tool -
(Last updated: Dec 10, 2025)
The Value Set Authority Center (VSAC) is a value set authoring tool and repository. It is the source of truth for value sets for CMS's electronic clinical quality measures. The National Library of Medicine maintains the VSAC and provides access via web browsers and APIs. The VSAC provides…

Value Set Authority Center (VSAC) Collaboration

Engagement Opportunity -
(Last updated: Jan 02, 2025)
Provides a central site where value set authors can post value sets for collaborative discussion. In that site, teams can share threaded discussions about the value sets, view recent value set expansions posted by site members, organize their value sets.

VSAC Support Center

eCQM Tool -
(Last updated: Dec 10, 2025)
The VSAC Support Center is the Help section of the Value Set Authority Center website. It provides information on how to use the VSAC, specific information for value set authors and stewards (e.g., how to create value sets), and additional information such as release notes and how to use the VSAC…

VSAC SVS API

eCQM Tool -
(Last updated: Dec 10, 2025)
The Value Set Authority Center (VSAC) Sharing Value Set (SVS) Application Programming Interface (API) allows the user to retrieve a single value set's expansion, with or without its metadata and definition version, using RetrieveMultipleValueSets and RetrieveValueSet, respectively. It is based on…
Subscribe to Associated with <strong>Health IT Developer/Vendor</strong>

We want your feedback

For technical questions about eCQMs, please log in to the ONC Project Tracking System, specifically the eCQM Issue Tracker.

eCQI Resource Center Feedback pertains to:
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.