{
 "id": "cms:9887a515-7552-4693-bf58-735c77af46d7",
 "slug": "opt-out-affidavits",
 "source": "data.cms.gov",
 "title": "Opt Out Affidavits",
 "summary": "Providers who chose not to participate in Medicare, with NPI, specialty, address and effective dates.",
 "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.",
 "aliases": [
  "opt out doctors",
  "doctors who do not take medicare"
 ],
 "keywords": [
  "Medicare",
  "Original Medicare",
  "Medicare Advantage",
  "Provider Enrollment"
 ],
 "themes": [
  "Medicare"
 ],
 "topics": [
  "doctors",
  "medicare-enrollment",
  "medicare-advantage"
 ],
 "category": "provider-characteristics",
 "publisher": "Office of Enterprise Data and Analytics (OEDA)",
 "contact": "ProviderEnrollmentDataRequests@cms.hhs.gov",
 "landing_url": "https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits",
 "csv_url": "https://data.cms.gov/sites/default/files/2026-10/3d5db078-2421-4f28-8e4a-73915daf6f4b/Opt_Out_List_September.csv",
 "api_url": "https://data.cms.gov/data-api/v1/dataset/9887a515-7552-4693-bf58-735c77af46d7/data",
 "api_kind": "cms-data-api",
 "preview_url": "https://data.cms.gov/data-api/v1/dataset/9887a515-7552-4693-bf58-735c77af46d7/data?size=10",
 "dictionary_url": "https://data.cms.gov/resources/opt-out-affidavits-data-dictionary",
 "dictionary_kind": "page",
 "methodology_urls": [
  "https://data.cms.gov/resources/opt-out-affidavits-methodology"
 ],
 "state_column": "State Code",
 "row_count": 59071,
 "posted": "2026-10-26",
 "modified": "2026-10-26",
 "period_start": "2023-04-01",
 "period_end": "2026-09-30",
 "latest_period": "2026-09-01 to 2026-09-30",
 "cadence": "monthly",
 "next_update": null,
 "versions": [
  {
   "label": "2026-09-01",
   "uuid": "9887a515-7552-4693-bf58-735c77af46d7",
   "posted": "2026-10-26",
   "period_start": "2026-09-01",
   "period_end": "2026-09-30"
  },
  {
   "label": "2026-08-01",
   "uuid": "204536ee-1220-4338-b980-bfff5ce41222",
   "posted": "2026-09-21",
   "period_start": "2026-08-01",
   "period_end": "2026-08-31"
  },
  {
   "label": "2026-07-01",
   "uuid": "47d7542f-8b22-46cf-9161-d2f120dcd55d",
   "posted": "2026-08-20",
   "period_start": "2026-07-01",
   "period_end": "2026-07-31"
  },
  {
   "label": "2026-06-01",
   "uuid": "6607afe6-6572-4d52-b29c-d0e77af14456",
   "posted": "2026-07-20",
   "period_start": "2026-06-01",
   "period_end": "2026-06-30"
  },
  {
   "label": "2026-04-01",
   "uuid": "5b6fccc9-ee41-454c-886d-67cc085acecf",
   "posted": "2026-05-26",
   "period_start": "2026-04-01",
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  },
  {
   "label": "2026-03-01",
   "uuid": "2cc38307-fe1a-466b-8aee-f30f9bfe0820",
   "posted": "2026-04-20",
   "period_start": "2026-03-01",
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  },
  {
   "label": "2026-02-01",
   "uuid": "6603a434-8aef-4385-abba-9f5b5ec674e4",
   "posted": "2026-03-23",
   "period_start": "2026-02-01",
   "period_end": "2026-02-28"
  },
  {
   "label": "2026-01-02",
   "uuid": "9bc1f326-ca5d-48f2-8057-1e15682f70eb",
   "posted": "2026-02-25",
   "period_start": "2026-01-01",
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  },
  {
   "label": "2025-12-01",
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   "posted": "2026-01-21",
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  },
  {
   "label": "2025-11-01",
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  },
  {
   "label": "2025-10-01",
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   "posted": "2025-11-24",
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  },
  {
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  },
  {
   "label": "2025-08-01",
   "uuid": "687622ff-481a-4ee9-aca1-eba28b4158ba",
   "posted": "2025-09-19",
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  },
  {
   "label": "2025-07-01",
   "uuid": "781da4ae-265f-476b-8f70-4b0c8c18a732",
   "posted": "2025-08-26",
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   "period_end": "2025-07-31"
  },
  {
   "label": "2025-06-01",
   "uuid": "2041464e-ff3b-47e8-bf4d-df225d809148",
   "posted": "2025-08-19",
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   "period_end": "2025-06-30"
  },
  {
   "label": "2025-05-01",
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  },
  {
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  },
  {
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   "uuid": "f9bf8080-34b3-4f13-9118-7b369dea5e3e",
   "posted": "2025-04-24",
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   "period_end": "2025-03-31"
  },
  {
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  {
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   "posted": "2025-02-27",
   "period_start": "2025-01-01",
   "period_end": "2025-01-31"
  },
  {
   "label": "2024-12-01",
   "uuid": "89adeb27-fd52-4e32-b1e8-d59d60695f92",
   "posted": "2025-01-22",
   "period_start": "2024-12-01",
   "period_end": "2024-12-31"
  },
  {
   "label": "2024-11-01",
   "uuid": "d096e8a1-6a47-4dc9-9abb-dbe07d49f0e2",
   "posted": "2024-12-20",
   "period_start": "2024-11-01",
   "period_end": "2024-11-30"
  },
  {
   "label": "2024-10-31",
   "uuid": "7f9f306c-5644-4459-9154-3f08aa3ef7a1",
   "posted": "2024-11-22",
   "period_start": "2024-10-01",
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  },
  {
   "label": "2024-09-01",
   "uuid": "0a52437c-589e-4938-bdb6-29cea99b219e",
   "posted": "2024-10-28",
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  },
  {
   "label": "2024-08-01",
   "uuid": "dfb9eb68-03df-4b03-9b11-195dd4e9e2da",
   "posted": "2024-09-23",
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  {
   "label": "2024-07-01",
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   "posted": "2024-08-26",
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  {
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  {
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   "posted": "2024-06-04",
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  {
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  {
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  },
  {
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   "posted": "2023-10-23",
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  },
  {
   "label": "2023-08-01",
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  },
  {
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  {
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  {
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  {
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   "uuid": "010003d2-acf5-4399-9e8b-7f603fab3b34",
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  }
 ],
 "columns": [
  {
   "name": "First Name",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "Last Name",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "NPI",
   "label": "NPI",
   "type": "number",
   "meaning": "National Provider Identifier (NPI) number of the Opt Out Provider",
   "source": "cms-dictionary"
  },
  {
   "name": "Specialty",
   "label": "Specialty",
   "type": "string",
   "meaning": "Specialty of the Opt Out Provider",
   "source": "cms-dictionary"
  },
  {
   "name": "Optout Effective Date",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "Optout End Date",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "First Line Street Address",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "Second Line Street Address",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "City Name",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "State Code",
   "label": null,
   "type": "string",
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   "source": "cms-api"
  },
  {
   "name": "Zip Code",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "Eligible to Order and Refer",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  },
  {
   "name": "Last Updated",
   "label": null,
   "type": "string",
   "meaning": null,
   "source": "cms-api"
  }
 ],
 "caveats": [],
 "curated": true,
 "license": "https://www.usa.gov/government-works",
 "detail_key": "9887a515-7552-4693-bf58-735c77af46d7|2026-10-26",
 "checked": "2026-10-26",
 "source_name": "data.cms.gov"
}