PART 421—MEDICARE CONTRACTING
- SUBPART A—Scope, Definitions, and General Provisions (§421.1 to §421.5)
- SUBPART B—Intermediaries (§421.100 to §421.128)
- SUBPART C—Carriers (§421.200 to §421.214)
- SUBPART D—Medicare Integrity Program Contractors (§421.300 to §421.316)
- SUBPART E—Medicare Administrative Contractors (MACs) (§421.400 to §421.404)
- SUBPART F—Medical Review (§421.500 to §421.505)