42 C.F.R. § 407.62 – Termination of coverage.

(a) Other coverage. An individual who enrolls in other coverage as described in § 407.55(b) will have his or her enrollment in the Part B-ID benefit terminated on either of the following bases:
1. (1) If the individual notifies SSA of such coverage consistent with § 407.59(b), their enrollment in the Part B-ID benefit will be terminated effective the first day of the month after the month of notification unless the individual requests a different, prospective termination date that is not after the effective date of enrollment in other health insurance coverage, as described in § 407.55(b).
2. (2) If the individual does not notify SSA of this coverage consistent with § 407.59(b), their enrollment in the Part B-ID benefit will be terminated effective the first day of the month after the month in which there is a determination of the individual's enrollment in coverage described in § 407.55(b).
(b) Death. Enrollment in the Part B-ID benefit ends on the last day of the month in which the individual dies.
(c) Nonpayment of premiums. If an individual fails to pay the premiums, the Part B-ID benefit enrollment will end as provided in the rules for Part B premiums set forth in part 408 of this chapter.
(d) Request by individual. An individual may request disenrollment at any time by notifying SSA that he or she no longer wants to be enrolled in the Part B-ID benefit. Such individual's enrollment in the Part B-ID benefit ends with the last day of the month in which the individual provides the disenrollment request, except for an individual who loses coverage under a State buy-in agreement, as described in § 407.50(b)(2)(i).
(e) Entitlement to Hospital Insurance benefits. Enrollment in the Part B-ID benefit ends effective the last day of the month prior to the month that the individual becomes entitled to benefits under § 406.5, § 406.12, or § 406.13 of this subchapter.
(f) Appeals. An involuntary termination of the Part B-ID benefit for reasons described at § 407.62(a)(2), (b), or (c) of this subsection, will be considered an initial determination that is appealable under § 405.904(a)(1) of this subchapter. An individual can request to continue receiving Part B-ID benefits while waiting for an appeals decision.