42 CFR § 424.3 - Definitions.
---
identifier: "/us/cfr/t42/s424.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 424.3 - Definitions."
title_number: 42
title_name: "Public Health"
section_number: "424.3"
section_name: "Definitions."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "MEDICARE PROGRAM"
part_number: "424"
part_name: "CONDITIONS FOR MEDICARE PAYMENT"
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 and 1395hh."
regulatory_source: "53 FR 6634, Mar. 2, 1988, unless otherwise noted."
cfr_part: "424"
---
# 424.3 Definitions.
As used in this part, unless the context indicates otherwise—
*HCPCS* means Healthcare Common Procedure Coding System.
ICD-9-CM means International Classification of Diseases, Ninth Revision, Clinical Modification.
*Nonparticipating hospital* means a hospital that does not have in effect a provider agreement to participate in Medicare.
*Participating hospital* means a hospital that has in effect a provider agreement to participate in Medicare.
[53 FR 6634, Mar. 2, 1988, as amended at 59 FR 10299, Mar. 4, 1994; 63 FR 26311, May 12, 1998; 70 FR 45055, Aug. 4, 2005]