---
kind: "section"
citation: "42 C.F.R. § 424.505"
title: "42"
number: "424.505"
heading: "Basic enrollment requirement."
url: "https://uscodex.org/cfr/42/424.505"
---

# §424.505. Basic enrollment requirement.


To receive payment for covered Medicare items or services from either Medicare (in the case of an assigned claim) or a Medicare beneficiary (in the case of an unassigned claim), a provider or supplier must be enrolled in the Medicare program. Except for those suppliers that complete the CMS-855O form or CMS-identified equivalent, successor form or process for the sole purpose of obtaining eligibility to order or certify Medicare-covered items and services; once enrolled the provider or supplier receives billing privileges and is issued a valid billing number effective for the date a claim was submitted for an item that was furnished or a service that was rendered. (See [45 CFR part 162](/cfr/45/part162.md) for information on the National Provider Identifier and its use as the Medicare billing number.)


## Notes

### Amendments

[71 FR 20776, Apr. 21, 2006, as amended at 79 FR 72531, Dec. 5, 2014]

### Source

Source: 71 FR 20776, Apr. 21, 2006, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 1302 and 1395hh.

### Source

Source: 53 FR 6634, Mar. 2, 1988, unless otherwise noted.

### Amendments

[71 FR 20776, Apr. 21, 2006, as amended at 79 FR 72531, Dec. 5, 2014]