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Opt Out Affidavits

Published by Centers for Medicare & Medicaid Services | U.S. Department of Health & Human Services | Catalog Last Checked: May 08, 2026 at 08:15 PM | Dataset Last Updated: April 20, 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.

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Complete Metadata
@type dcat:Dataset
accessLevel public
accrualPeriodicity R/P1M
bureauCode 
                                            [
  "009:38"
]
contactPoint 
                                            {
  "fn": "Provider Enrollment Data Requests - CPI",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:ProviderEnrollmentDataRequests@cms.hhs.gov"
}
dataQuality 
                                            true
describedBy https://data.cms.gov/resources/opt-out-affidavits-data-dictionary
description 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.
distribution 
                                            [
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-04-30",
    "format": "API",
    "accessURL": "https://data.cms.gov/data-api/v1/dataset/010003d2-acf5-4399-9e8b-7f603fab3b34/data"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2024-09-01",
    "format": "API",
    "accessURL": "https://data.cms.gov/data-api/v1/dataset/0a52437c-589e-4938-bdb6-29cea99b219e/data"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-06-30",
    "format": "API",
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  },
  {
    "@type": "dcat:Distribution",
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  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2025-06-01",
    "format": "API",
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  },
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  },
  {
    "@type": "dcat:Distribution",
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  },
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  },
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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  },
  {
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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  },
  {
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  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-04-30",
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  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-05-01",
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  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-06-30",
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  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-07-01",
    "mediaType": "text/csv",
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  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2023-08-01",
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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  },
  {
    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2024-11-01",
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  },
  {
    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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  {
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
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  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2025-11-01",
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    "@type": "dcat:Distribution",
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  },
  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2026-01-02",
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  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2026-02-01",
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  {
    "@type": "dcat:Distribution",
    "title": "Opt Out Affidavits : 2026-03-01",
    "mediaType": "text/csv",
    "downloadURL": "https://data.cms.gov/sites/default/files/2026-04/97f55b8c-759c-4e60-a19c-ffc99912ff32/OptOut_March2026.csv"
  }
]
identifier https://data.cms.gov/data-api/v1/dataset/9887a515-7552-4693-bf58-735c77af46d7/data-viewer
issued 2025-12-09
keyword 
                                            [
  "medicare",
  "medicare advantage",
  "original medicare",
  "provider enrollment"
]
landingPage https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
language 
                                            [
  "en-US"
]
license https://www.usa.gov/government-works
modified 2026-04-20
programCode 
                                            [
  "009:000"
]
publisher 
                                            {
  "name": "Centers for Medicare & Medicaid Services",
  "@type": "org:Organization"
}
references 
                                            [
  "https://data.cms.gov/resources/opt-out-affidavits-methodology"
]
temporal 2023-04-01/2026-03-31
theme 
                                            [
  "Medicare"
]
title Opt Out Affidavits

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