Timing

Changing Plans

When and how to switch between Original Medicare, Advantage, and Part D plans.

You can change Medicare plans during certain windows: AEP (Oct 15 – Dec 7), the Medicare Advantage OEP (Jan 1 – Mar 31), and Special Enrollment Periods for qualifying events.

Key points

  • Compare formularies, provider networks, and total yearly cost — not just premium.
  • Switching from Advantage back to Original Medicare + Medigap can involve medical underwriting after your initial window.
  • Prescription needs change; so should your plan review each year.

Common questions

Next steps

Related topics

Educational only. This information is not personalized advice. For your specific situation, verify at Medicare.gov or speak with a licensed Medicare professional.