42 CFR § 423.641 - Contract determinations.

---
identifier: "/us/cfr/t42/s423.641"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 423.641 - Contract determinations."
title_number: 42
title_name: "Public Health"
section_number: "423.641"
section_name: "Contract determinations."
chapter_name: "CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "MEDICARE PROGRAM"
part_number: "423"
part_name: "VOLUNTARY MEDICARE PRESCRIPTION DRUG BENEFIT"
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. 1302, 1306, 1395w-101 through 1395w-152, and 1395hh."
regulatory_source: "70 FR 4525, Jan. 28, 2005, unless otherwise noted."
cfr_part: "423"
---


# 423.641 Contract determinations.

This subpart establishes the procedures for reviewing the following contract determinations:

(a) A determination that an entity is not qualified to enter into a contract with CMS under Part D of title XVIII of the Act.

(b) A determination not to authorize a renewal of a contract with a PDP sponsor in accordance with § 423.507(b).

(c) A determination to terminate a contract with a PDP sponsor in accordance with § 423.509.

(d) Fallback entities are governed under subpart Q of this part, and are not subject to this subpart, except to the extent a fallback prescription drug plan contract is terminated by CMS.