42 C.F.R. § 423.508 Modification or termination of contract by mutual consent.
Title 42 - Public Health
(a) General rule. A contract may be modified or terminated at any time by written mutual consent. (b) Notification of termination. If the contract is terminated by mutual consent, the Part D plan sponsor must provide notice to its Medicare enrollees and the general public as provided in paragraph (c) of this section. (c) Notification of modification. If the contract is modified by mutual consent, the Part D plan sponsor must notify its Medicare enrollees of any changes that CMS determines are appropriate for notification within timeframes specified by CMS. (d) Timely transfer of data and files. If a contract is terminated under paragraph (a) of this section, the Part D plan sponsor must ensure the timely transfer of any data or files.
Title 42: Public Health
PART 423—VOLUNTARY MEDICARE PRESCRIPTION DRUG BENEFIT
Subpart K—Application Procedures and Contracts with Part D plan sponsors
§ 423.508 Modification or termination of contract by mutual consent.

