42 CFR § 401.303 - Definitions.

---
identifier: "/us/cfr/t42/s401.303"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 401.303 - Definitions."
title_number: 42
title_name: "Public Health"
section_number: "401.303"
section_name: "Definitions."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "A"
subchapter_name: "GENERAL PROVISIONS"
part_number: "401"
part_name: "GENERAL ADMINISTRATIVE REQUIREMENTS"
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, 1395hh, 1395w-5, and 1395kk-2."
cfr_part: "401"
---


# 401.303 Definitions.

For purposes of this subpart—

*Medicare contractor* means a Part A/Part B Medicare Administrative Contractor (A/B MAC) or a Durable Medical Equipment Medicare Administrative Contractor (DME MAC).

*Overpayment* means any funds that a person has received or retained under title XVIII of the Act to which the person, after applicable reconciliation, is not entitled under such title.

*Person* means a provider (as defined in § 400.202 of this chapter) or a supplier (as defined in § 400.202 of this chapter).