PECOS Medicare Enrollment Lookup

Medicare enrollment status from CMS public PECOS files

Search Medicare enrollment status by National Provider Identifier (NPI) using CMS public PECOS/PPEF files. Confirm results on the official CMS PECOS website.

Reference information only. Not medical, legal, or immigration advice. Not official CMS guidance. Full disclaimer

Official CMS resources

CMS — Medicare Enrollment and NPI (PDF)
Clarifies that physicians must obtain an NPI before Medicare enrollment; an NPI alone does not enable Medicare billing.
NPI Application
PECOS — Medicare Provider Enrollment
Official CMS system to enroll in Medicare after you have an NPI. Separate from NPPES NPI assignment.
Medicare Enrollment
PECOS Provider Resources
Forms, guides, and help for Medicare enrollment (CMS-855 series), not for initial NPI enumeration.
Medicare Enrollment
CMS-855I — Physicians and Non-Physician Practitioners (PDF)
Medicare enrollment application for individual practitioners billing fee-for-service.
Medicare Enrollment
CMS-855O — Ordering and Referring (PDF)
Enrollment for physicians who order and refer but do not bill as rendering providers.
Medicare Enrollment
CMS-855B — Medicare health plans / DMEPOS (PDF)
Enrollment for certain organizations (e.g. Medicare health plans, DMEPOS)—not for individual reassignment. Reassignment uses CMS-855I Section 4F.
Medicare Enrollment
CMS bulletin — CMS-855R merged into CMS-855I
Official notice that CMS-855R was discontinued and reassignment is reported on CMS-855I (effective 2023).
Medicare Enrollment
CMS-855A — Medicare Enrollment Application (PDF)
Enrollment application for Medicare suppliers and organizations (Type 2 NPI).
Medicare Enrollment

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Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

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