Index draft
The Value Set Authority Center (VSAC) is a repository and authoring tool for public value sets created by external programs. The VSAC is provided by the National Library of Medicine (NLM), in collaboration with the Office of the National Coordinator for Health Information Technology (ONC) and CMS. Subscribe to the VSAC Updates listserv for VSAC announcements about new content releases and functionality updates. Please send any questions or feedback regarding VSAC to NLM Support
About VSAC
- VSAC Services
- Code System Inclusion Policy
- VSAC Listserv Policy
- VSAC Release and Updates
- VSAC Users' Forum Monthly Webinar and Archived Recordings (updated 2015)
- Papers and Posters
How to Use VSAC
- Request a UMLS License
- Search VSAC
- VSAC Comparison Tool NEW!
- VSAC API: SVS and FHIR
- VSAC Collaboration Tool User's Guide
Electronic Clinical Quality Measures (eCQMs)
For VSAC Authors and Stewards
- Author Registration
- Author/Steward Group Management
- Author/Steward Roles
- Authoring Best Practices
- Change Value Set Ownership
- Code Systems and Tools
- Convert to Intensional
- COVID-19 Provisional Codes
- COVID-19 Value Sets in VSAC: no login needed
- Creating Value Sets
- Direct Reference Code API URLs
- Generating Expansions in Authoring
- Keyword Management
- Purpose Statement Bulk Editing NEW!
- Track Value Set Changes NEW!
- Updating Value Sets
- Value Set Audit Log NEW!
- Value Set Definition
- Value Set Life Cycle
- Value Set Status: Review and Maintenance NEW!
- Value Set Usage Summary NEW!
Last Reviewed: October 28, 2023