42 CFR § 405.1114 - Dismissal of request for review.
The Council dismisses a request for review if the party requesting review did not file the request within the stated period of time and the time for filing has not been extended. The Council also dismisses the request for review if—
(a) The party asks to withdraw the request for review;
(1) The request for review was filed by the beneficiary or the beneficiary's representative, and the beneficiary's surviving spouse or estate has no remaining financial interest in the case. In deciding this issue, the Council considers whether the surviving spouse or estate remains liable for the services that were denied or a Medicare contractor held the beneficiary liable for subsequent similar services under the limitation on liability provisions based on the denial of the services at issue;