42 CFR § 423.558 - Scope.
---
identifier: "/us/cfr/t42/s423.558"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "42 CFR § 423.558 - Scope."
title_number: 42
title_name: "Public Health"
section_number: "423.558"
section_name: "Scope."
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"
---
# 423.558 Scope.
(a) This subpart sets forth the requirements relating to the following:
(1) Part D plan sponsors with respect to grievances, coverage determinations, and redeterminations.
(2) Part D IRE with respect to reconsiderations.
(3) Part D enrollees' rights with respect to grievances, coverage determinations, redeterminations, and reconsiderations.
(4) Review of at-risk determinations made under a drug management program in accordance with § 423.153(f).
(b) The requirements regarding reopenings, ALJ hearings and ALJ and attorney adjudicator decisions, Council review, and judicial review are set forth in subpart U of this chapter.
[74 FR 65363, Dec. 9, 2009, as amended at 82 FR 5125, Jan. 17, 2017; 83 FR 16750, Apr. 16, 2018]