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CMS Medicare Opt-Out Affidavits

Federal

Lookup Provider

Verification URL

https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits

Platform Type

rest_api

Capabilities

Direct API available

No CAPTCHA

Required Fields

NPI Number
npi
Last Name
last_name

Notes

DKAN-based API. Returns opt-out status, effective/end dates.

CMS Medicare Opt-Out Affidavits — Credentia Source Browser