42 CFR § 417.434
Reenrollment
June 11, 2020
If an HMO or CMP requires periodic reenrollment, it must reenroll Medicare enrollees unless there is a basis for disenrollment as set forth in §417.460.
[50 FR 1346, Jan. 10, 1985, as amended at 58 FR 38082, July 15, 1993]