Medicare Enrollment Periods, Explained

Different Medicare enrollment periods allow different changes. The right window depends on whether you are enrolling for the first time, changing plans, or responding to a qualifying life event.

Identify the kind of change you need

Common situations to review include:

• Becoming eligible for Medicare for the first time.
• Retiring or losing qualifying employer coverage.
• Reviewing an existing Medicare Advantage or Part D plan.
• Moving outside a plan's service area.

Each situation has its own timing and eligibility rules.

Keep the coverage dates together

Before changing anything, write down when your current coverage ends and when the new coverage would begin. Ask whether the change could affect prescription coverage, enrollment penalties, or your ability to buy a Medigap policy.

An annual opportunity to change one type of plan does not necessarily create the same enrollment rights for every other type of coverage.

Confirm the window that applies to you

Use Medicare.gov to confirm current official rules. If you are weighing different approaches, read our Advantage and Supplement overview and ask about your Medicare options.