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    • Medicare Fee-for-Service Comprehensive Error Rate Testing

    Metadata Updated: February 4, 2026

    The Medicare Fee-for-Service (FFS) Comprehensive Error Rate Testing (CERT) dataset provides information on a random sample of FFS claims to determine if they were paid properly under Medicare coverage, coding, and payment rules. The dataset contains information on type of FFS claim, Diagnosis Related Group (DRG) and Healthcare Common Procedure Coding System (HCPCS) codes, provider type, type of bill, review decision, and error code.

    Please note, each reporting year (RY) contains claims submitted July 1 two years before the report through June 30 one year before the report. For example, the 2024 data contains claims submitted July 1, 2022 through June 30, 2023.

    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-fee-for-service-comprehensive-error-rate-testing-improper-payment-data-methodology

    Dates

    Metadata Created Date January 25, 2022
    Metadata Updated Date February 4, 2026
    Data Update Frequency R/P1Y

    Metadata Source

    Harvested from Healthdata.gov

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 25, 2022
    Metadata Updated Date February 4, 2026
    Publisher Centers for Medicare & Medicaid Services
    Maintainer
    Identifier https://data.cms.gov/data-api/v1/dataset/6395b458-2f89-4828-8c1a-e1e16b723d48/data-viewer
    Data First Published 2025-12-09
    Language en-US
    Data Last Modified 2026-02-03
    Category Medicare
    Public Access Level public
    Data Update Frequency R/P1Y
    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-fee-for-service-comprehensive-error-rate-testing-improper-payment-data-dictionary
    Harvest Object Id ae06e4f4-6067-4f97-b66c-0942feeb61ec
    Harvest Source Id 651e43b2-321c-4e4c-b86a-835cfc342cb0
    Harvest Source Title Healthdata.gov
    Homepage URL https://data.cms.gov/provider-compliance/fee-for-service-error-rate-improper-payment/medicare-fee-for-service-comprehensive-error-rate-testing
    License https://www.usa.gov/government-works
    Program Code 009:000
    Related Documents https://data.cms.gov/resources/medicare-fee-for-service-comprehensive-error-rate-testing-improper-payment-data-methodology
    Source Datajson Identifier True
    Source Hash 4ccf7129898a28eacceb1e14861d181ece78e7cc552e63eec6ca35f7a0c29294
    Source Schema Version 1.1
    Temporal 2011-01-01/2025-12-31

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