Medicare enrollment application types
Look up which Medicare enrollment form applies to a provider or supplier situation, and what each one is for.
Updated
Search the Medicare provider and supplier enrollment application set by form number or by situation. The correct form depends on who is enrolling and why; most can be completed on paper or electronically through PECOS. Form editions, instructions, and requirements are set by CMS and change over time, so confirm the current version and its use on the CMS enrollment pages before filing.
8 applications shown
| Form | Who files it | Purpose |
|---|---|---|
| CMS-855A | Institutional providers | Enrolls institutional providers such as hospitals, skilled nursing facilities, home health agencies, and hospices in Medicare. |
| CMS-855B | Clinics, group practices, and certain suppliers | Enrolls organizations that bill Medicare Part B for services — group practices, clinics, and other supplier organizations — rather than individual practitioners. |
| CMS-855I | Individual physicians and non-physician practitioners | Enrolls an individual physician or non-physician practitioner, whether billing directly or reassigning benefits to an organization. |
| CMS-855R | Individuals reassigning benefits | Reassigns an individual practitioner's right to bill and be paid to an organization or group they render services for. |
| CMS-855O | Order/certify/refer-only practitioners | Enrolls physicians and eligible practitioners solely to order, certify, or refer for Medicare beneficiaries when they do not bill Medicare directly. |
| CMS-855S | DMEPOS suppliers | Enrolls suppliers of durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS). |
| CMS-588 | Any provider/supplier setting up electronic payment | Authorizes Electronic Funds Transfer (EFT) so Medicare payments are deposited directly to a designated bank account. |
| CMS-460 | Providers electing participation | The Medicare Participating Physician or Supplier Agreement, by which a provider agrees to accept assignment on all Medicare claims. |
Check the controlling source
This lookup names each application and its purpose; it is not a substitute for the current CMS form instructions. Use the official CMS Medicare provider enrollment pages and the applicable Medicare Administrative Contractor's guidance as the controlling sources.
Source and currency
CMS Medicare provider/supplier enrollment application set · Updated Form editions vary by application; confirm current versions at CMS · Reviewed July 18, 2026
CMS — Medicare Provider Enrollment (application set) (opens in a new tab)
Related Knowledge
- The CMS-855 application family
How the 855 forms map to enrollment scenarios.
- Medicare enrollment with PECOS
- Credentialing