Story perspectives
Medicare Enrollment: Key Dates and Coverage Changes Explained
10/27/2025
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Story summary
- Beneficiaries enroll during the Initial Enrollment Period (IEP), a seven-month window around age 65, to start Medicare Advantage.
- The Annual Enrollment Period (AEP) runs October 15 through December 7; changes take effect January 1.
- SEPs let individuals adjust coverage after life events, such as moving.
- To enroll, individuals must have Medicare Part A and Part B and apply during an eligible period.
