42 CFR 423.2114 - Dismissal of request for review.
The MAC dismisses a request for review if the enrollee requesting review did not file the request within the stated period of time and the time for filing has not been extended. The MAC also dismisses the request for review if -
(a) The enrollee asks to withdraw the request for review;
(b) The individual or entity does not have a right to request MAC review; or
(c) The enrollee died while the request for review is pending and the enrollee's estate or representative, if any, either has no remaining financial interest in the case or does not want to continue the appeal.