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    • Medicare Monthly Enrollment

    Metadata Updated: March 25, 2026

    The Medicare Monthly Enrollment data provides current monthly information on the number of Medicare beneficiaries with hospital/medical coverage and prescription drug coverage, available for several geographic areas including national, state/territory, and county. The hospital/medical coverage data can be broken down further by health care delivery (Original Medicare versus Medicare Advantage and Other Health Plans) and the prescription drug coverage data can be examined by those enrolled in stand-alone Prescription Drug Plans and those enrolled in Medicare Advantage Prescription Drug plans. The dataset provides monthly and yearly enrollee trends.

    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/medicare-monthly-enrollment-methodology

    Dates

    Metadata Created Date January 25, 2022
    Metadata Updated Date March 25, 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 March 25, 2026
    Publisher Centers for Medicare & Medicaid Services
    Maintainer
    Identifier https://data.cms.gov/data-api/v1/dataset/d7fabe1e-d19b-4333-9eff-e80e0643f2fd/data-viewer
    Data First Published 2025-12-09
    Language en-US
    Data Last Modified 2026-03-24
    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/medicare-monthly-enrollment-data-dictionary
    Harvest Object Id 84cc183f-3773-48d0-8c5d-777dc6a2812b
    Harvest Source Id 651e43b2-321c-4e4c-b86a-835cfc342cb0
    Harvest Source Title Healthdata.gov
    Homepage URL https://data.cms.gov/summary-statistics-on-beneficiary-enrollment/medicare-and-medicaid-reports/medicare-monthly-enrollment
    License https://www.usa.gov/government-works
    Program Code 009:000
    Related Documents https://data.cms.gov/resources/medicare-monthly-enrollment-methodology
    Source Datajson Identifier True
    Source Hash fdf5509c842da0a023d8003ea0c78dc85b0d53f09b4600ff2f8d1434148c583d
    Source Schema Version 1.1
    Temporal 2025-12-01/2025-12-31

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