42 CFR § 428.400 - Definitions.

---
identifier: "/us/cfr/t42/s428.400"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 428.400 - Definitions."
title_number: 42
title_name: "Public Health"
section_number: "428.400"
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: "428"
part_name: "MEDICARE PART D DRUG INFLATION REBATE PROGRAM"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 1395w-114b, 1302, and 1395hh."
regulatory_source: "89 FR 98588, Dec. 9, 2024, unless otherwise noted."
cfr_part: "428"
---


# 428.400 Definitions.

For the purposes of this subpart, *date of receipt* is the calendar day following the day in which a report of a rebate amount (as set forth in §§ 428.401(b), (c), and (d) and 428.402(b) and (c)) is made available to the manufacturer of a Part D rebatable drug by CMS.