Can I Change Medicare Plans Anytime?
Mostly no. Changes usually happen during set windows, such as Annual Open Enrollment and the Medicare Advantage Open Enrollment Period, with Special Enrollment Periods for specific life events.
Quick answer
Generally no. Most changes happen during set windows: Annual Open Enrollment (October 15–December 7) and the Medicare Advantage Open Enrollment Period (January 1–March 31) for people already in Medicare Advantage. Special Enrollment Periods allow changes after certain events, such as moving out of a plan's service area or losing other coverage.
The main windows
| Window | Dates | What you can do |
|---|---|---|
| Annual Open Enrollment | October 15 – December 7 | Switch between Original Medicare and Medicare Advantage; change Medicare Advantage or Part D plans; changes start January 1 |
| Medicare Advantage Open Enrollment | January 1 – March 31 | If in Medicare Advantage, switch to another Medicare Advantage plan or to Original Medicare (and join Part D) once |
| Special Enrollment Periods | Varies by event | Changes after qualifying events like moving, losing coverage, or plan changes |
Medigap is different
Medigap policies aren't tied to these windows the same way. You can apply for Medigap anytime, but outside your Medigap open enrollment period or a guaranteed issue situation, insurers in most states can use medical underwriting. See Medigap underwriting rules.
Review every year
Plans change premiums, networks, drug lists, and benefits annually. Read your Annual Notice of Change each fall.
See Medicare enrollment periods and penalties.
The takeaway
Medicare changes happen mostly in specific windows. Mark Annual Open Enrollment on your calendar and review your plan every fall.
Sources
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