42 C.F.R. § 488.604 : Public Health — CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES — STANDARDS AND CERTIFICATION — SURVEY, CERTIFICATION, AND ENFORCEMENT PROCEDURES — TERMINATION OF MEDICARE COVERAGE AND ALTERNATIVE SANCTIONS FOR END-STAGE RENAL DISEASE (ESRD) FACILITIES — Termination of Medicare coverage

(a) Except as otherwise provided in this subpart, failure of a supplier of ESRD services to meet one or more of the conditions for coverage set forth in part 494 of this chapter will result in termination of Medicare coverage of the services furnished by the supplier.
(b) If termination of coverage is based solely on a supplier's failure to participate in network activities and pursue network goals, as required at §494.180(i) of this chapter, coverage may be reinstated when CMS determines that the supplier is making reasonable and appropriate efforts to meet that condition.
(c) If termination of coverage is based on failure to meet any of the other conditions specified in part 494 of this chapter, coverage will not be reinstated until CMS finds that the reason for termination has been removed and there is reasonable assurance that it will not recur.

42 C.F.R. §488.604