(a) ESRD patients. (1) A Medicare beneficiary who has been medically determined to have end-stage renal disease is not eligible to enroll in an HMO or CMP.

(2) However, if a beneficiary is already enrolled in an HMO or CMP when he or she is determined to have end-stage renal disease, the HMO or CMP—

(i) Must reenroll the beneficiary as required by § 417.434; and

(ii) May not disenroll the beneficiary except as provided in § 417.460.

(b) Hospice patients. A Medicare beneficiary who elects hospice care under § 418.24 of this chapter is not eligible to enroll in an HMO or CMP as long as the hospice election remains in effect.