What can I do during Medicare Advantage Open Enrollment Period?
During the Medicare Advantage open enrollment period (January 1 – March 31), People who are already enrolled in Medicare Advantage can:
Switch to Original Medicare (and enroll in a Part D plan; access to Medicare Supplement Plan might require medical underwriting, depending on the circumstances of the individual.
Switch to a different Medicare Advantage plan.
Only one plan change is allowed during this window (unlike the fall enrollment period, when a person can change their mind multiple times, with the last plan selection taking effect on January 1).