Medicare Open Enrollment 2025. Medicare advantage open enrollment runs from january 1 to march 31 — you can change advantage plans, switch to original medicare and enroll in a part d drug plan. Your first chance to enroll, which generally happens when you turn 65, is.

Medicare’s open enrollment period, known as the “medicare advantage and prescription drug plan annual election period,” “annual enrollment period” or “aep,” takes place each year from oct. During this window, beneficiaries can.