The Medicare Advantage Open Enrollment Period (OEP) for 2026 runs January 1 through March 31. This is your chance to make changes if your current plan isn’t working — and many people don’t even know it exists.

What Is the MA Open Enrollment Period?

The OEP is a 3-month window at the start of each year where current Medicare Advantage enrollees can make one change:

Important: You can only make one change during the OEP. It’s effective the first of the month after your enrollment.

OEP vs. AEP — What’s the Difference?

Feature AEP (Oct 15 – Dec 7) OEP (Jan 1 – Mar 31)
Who can use it All Medicare beneficiaries Current MA enrollees only
Number of changes Unlimited during period One change total
Can join MA from Original? Yes No

When Should You Use the OEP?

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