U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 42Chapter IVPart 423Subpart C - Subpart C—Benefits and Beneficiary Protections
§ 423.100 - Definitions.
§ 423.104 - Requirements related to qualified prescription drug coverage.
§ 423.112 - Establishment of prescription drug plan service areas.
§ 423.120 - Access to covered Part D drugs.
§ 423.124 - Special rules for out-of-network access to covered Part D drugs at out-of-network pharmacies.
§ 423.128 - Dissemination of Part D plan information.
§ 423.129 - Resolution of complaints in complaints tracking module.
§ 423.132 - Public disclosure of pharmaceutical prices for equivalent drugs.
§ 423.136 - Privacy, confidentiality, and accuracy of enrollee records.
§ 423.137 - Medicare Prescription Payment Plan.
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