42 CFR § 455.504 - Definitions.

---
identifier: "/us/cfr/t42/s455.504"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 455.504 - Definitions."
title_number: 42
title_name: "Public Health"
section_number: "455.504"
section_name: "Definitions."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "C"
subchapter_name: "MEDICAL ASSISTANCE PROGRAMS"
part_number: "455"
part_name: "PROGRAM INTEGRITY: MEDICAID"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 1302."
regulatory_source: "43 FR 45262, Sept. 29, 1978, unless otherwise noted."
cfr_part: "455"
---


# 455.504 Definitions.

As used in this subpart—

*Medicaid RAC program* means a recovery audit contractor program administered by a State to identify overpayments and underpayments and recoup overpayments.

*Medicare RAC program* means a recovery audit contractor program administered by CMS to identify underpayments and overpayments and recoup overpayments, established under the authority of section 1893(h) of the Act.