42 C.F.R. § 402.308
(b) Definitions. For purposes of this section:
Excluded person has the same meaning as a “person” as defined in § 402.3 who meets for the purposes of this subpart, the definition of the term “exclusion” in § 402.3.
Hardship for purposes of this section means something that negatively affects Medicare beneficiaries and results from the imposition of an exclusion because the excluded person is the sole community physician or sole source of essential specialized services in the Medicare community.
Sole community physician has the same meaning as that term is defined § 1001.2 of this title.
Sole source of essential specialized services in the community has the same meaning as that term defined by the § 1001.2 of this title.
(d) Submission and content of a waiver of exclusion request. An excluded person must submit a request for waiver of exclusion in writing to CMS that includes the following:
(e) Processing of waiver of exclusion requests. CMS processes a request for a waiver of exclusion as follows: