data.cms.govHand-written summary
Opt Out Affidavits
Providers who chose not to participate in Medicare, with NPI, specialty, address and effective dates.
Freshness
- Last posted
- Period covered
- Sep 1, 2026 to Sep 30, 2026
- Update frequency
- Monthly
Dates as CMS lists them in its catalog.
Columns 13
| Column | What it means | Type |
|---|---|---|
First NameFirst Name | string | |
Last NameLast Name | string | |
NPINPI | National Provider Identifier (NPI) number of the Opt Out Provider | number |
SpecialtySpecialty | Specialty of the Opt Out Provider | string |
Optout Effective DateOptout Effective Date | string | |
Optout End DateOptout End Date | string | |
First Line Street AddressFirst Line Street Address | string | |
Second Line Street AddressSecond Line Street Address | string | |
City NameCity Name | string | |
State CodeState Code | string | |
Zip CodeZip Code | string | |
Eligible to Order and ReferEligible to Order and Refer | string | |
Last UpdatedLast Updated | string |
No column matches that filter.
At a glance
- Catalog
- data.cms.gov
- Publisher
- Office of Enterprise Data and Analytics (OEDA)
- Rows
- 59,071
- Columns
- 13
- State column
State Code
API
Free, no key needed. This request returns the first 10 rows as JSON:
https://data.cms.gov/data-api/v1/dataset/9887a515-7552-4693-bf58-735c77af46d7/data?size=10
To keep only one state, filter on the State Code column.
Versions 41
The newest version is the one linked above. Older releases stay on the official site.
- 2026-09-01posted Oct 26, 2026
- 2026-08-01posted Sep 21, 2026
- 2026-07-01posted Aug 20, 2026
- 2026-06-01posted Jul 20, 2026
- 2026-04-01posted May 26, 2026
- 2026-03-01posted Apr 20, 2026
- 2026-02-01posted Mar 23, 2026
- 2026-01-02posted Feb 25, 2026
Show 33 older versions
- 2025-12-01posted Jan 21, 2026
- 2025-11-01posted Dec 22, 2025
- 2025-10-01posted Nov 24, 2025
- 2025-09-01posted Oct 28, 2025
- 2025-08-01posted Sep 19, 2025
- 2025-07-01posted Aug 26, 2025
- 2025-06-01posted Aug 19, 2025
- 2025-05-01posted Jun 27, 2025
- 2025-04-01posted May 27, 2025
- 2025-03-01posted Apr 24, 2025
- 2025-02-01posted Mar 24, 2025
- 2025-01-31posted Feb 27, 2025
- 2024-12-01posted Jan 22, 2025
- 2024-11-01posted Dec 20, 2024
- 2024-10-31posted Nov 22, 2024
- 2024-09-01posted Oct 28, 2024
- 2024-08-01posted Sep 23, 2024
- 2024-07-01posted Aug 26, 2024
- 2024-06-01posted Jul 22, 2024
- 2024-05-01posted Jun 17, 2024
- 2024-04-01posted Jun 4, 2024
- 2024-03-01posted Apr 24, 2024
- 2024-02-01posted Apr 17, 2024
- 2024-01-01posted Mar 15, 2024
- 2023-12-31posted Jan 22, 2024
- 2023-11-01posted Jan 8, 2024
- 2023-10-01posted Nov 20, 2023
- 2023-09-01posted Oct 23, 2023
- 2023-08-01posted Sep 18, 2023
- 2023-07-01posted Aug 18, 2023
- 2023-06-30posted Jul 19, 2023
- 2023-05-01posted Jun 22, 2023
- 2023-04-30posted May 17, 2023
CMS's 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.
Methodology and other documents from CMS:
The summary at the top was written by hand from this description. Record id cms:9887a515-7552-4693-bf58-735c77af46d7. This record as JSON.