42 CFR 421.401 : Public Health (Part 1 To Parts 1009-1099) — (§ 414.1 To Parts 427-429) — Centers For Medicare & Medicaid Services, Department Of Health And Human Services (Continued) (§ 414.1 To Parts 427-429) — Medicare Program (Continued) (§ 414.1 To Parts 427-429) — Medicare Contracting (§ 421.1 To Subpart F) — Medicare Administrative Contractors (Macs) (§ 421.400 To § 421.404) — Definitions.

For purposes of this subpart -

Appropriate MAC means a MAC that has a contract under section 1874A of the Act to perform a particular Medicare administrative function in relation to:

(1) A particular individual entitled to benefits under Part A or enrolled under Part B, or both;

(2) A specific provider of services or supplier; or

(3) A class of providers of services or suppliers.

Medicare Administrative Contractor (MAC) means an agency, organization, or other person with a contract under section 1874A of the Act.