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    • Opt Out Affidavits

    Metadata Updated: January 23, 2026

    The Opt Out Affidavits dataset provides information on providers who have decided not to participate in Medicare. It contains provider's NPI, specialty, address, and effective dates.

    Access & Use Information

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

    Downloads & Resources

    References

    https://data.cms.gov/resources/opt-out-affidavits-methodology

    Dates

    Metadata Created Date January 25, 2022
    Metadata Updated Date January 23, 2026
    Data Update Frequency R/P1M

    Metadata Source

    Harvested from Healthdata.gov

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 25, 2022
    Metadata Updated Date January 23, 2026
    Publisher Centers for Medicare & Medicaid Services
    Maintainer
    Identifier https://data.cms.gov/data-api/v1/dataset/9887a515-7552-4693-bf58-735c77af46d7/data-viewer
    Data First Published 2025-12-09
    Language en-US
    Data Last Modified 2026-01-21
    Category Medicare
    Public Access Level public
    Data Update Frequency R/P1M
    Bureau Code 009:38
    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
    Data Quality True
    Data Dictionary https://data.cms.gov/resources/opt-out-affidavits-data-dictionary
    Harvest Object Id 3d916964-a4f3-4ffa-b6b6-20247a615270
    Harvest Source Id 651e43b2-321c-4e4c-b86a-835cfc342cb0
    Harvest Source Title Healthdata.gov
    Homepage URL https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
    License https://www.usa.gov/government-works
    Program Code 009:000
    Related Documents https://data.cms.gov/resources/opt-out-affidavits-methodology
    Source Datajson Identifier True
    Source Hash 88394c9c4833230f0fac864eedcb8ecf13c8343f06024bfa713417f921dde785
    Source Schema Version 1.1
    Temporal 2023-04-01/2025-12-31

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