When Does Open Enrollment Start 2025 Medicare Advantage. If you have medicare, open enrollment — which runs from october 15 through december 7 — is when you can. Yes, an individual eligible for medicare may switch from original medicare to a medicare advantage plan during the annual open enrollment period, which runs from october.
The part a / part b general enrollment period is january 1 through march 31. We’ll walk you through what you need to know to take advantage of this window.