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    • Value Set Authority Center

    Metadata Updated: June 19, 2025

    The VSAC is a repository and authoring tool for public value sets created by external programs. Value sets are lists of codes and corresponding terms, from NLM-hosted standard clinical vocabularies (such as SNOMED CT®, RxNorm, LOINC® and others), that define clinical concepts to support effective and interoperable health information exchange. The VSAC does not create value set content. The VSAC also provides downloadable access to all official versions of value sets specified by the Centers for Medicare & Medicaid Services (CMS) electronic Clinical Quality Measures (eCQMs). For information on CMS eCQMs, visit the eCQI Resource Center. 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.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date April 6, 2021
    Metadata Updated Date June 19, 2025

    Metadata Source

    Harvested from Healthdata.gov

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 6, 2021
    Metadata Updated Date June 19, 2025
    Publisher National Library of Medicine
    Maintainer
    Identifier https://datadiscovery.nlm.nih.gov/api/views/qbke-6ijm
    Data First Published 2016-08-04
    Data Last Modified 2025-06-18
    Category Terminology
    Public Access Level public
    Bureau Code 009:25
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://healthdata.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 1702eb71-7566-4d7a-bc3b-be3362b1c387
    Harvest Source Id 651e43b2-321c-4e4c-b86a-835cfc342cb0
    Harvest Source Title Healthdata.gov
    Homepage URL https://vsac.nlm.nih.gov/
    License http://opendefinition.org/licenses/odc-odbl/
    Program Code 009:041
    Source Datajson Identifier True
    Source Hash 93d6c6680891f52f469049d3ba239f02c02f1af3f22c67bcc0525e2d7d5ffd30
    Source Schema Version 1.1

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