Choosing a Medicare Advantage plan is not a one-time decision set in stone. Most people can select coverage during the Annual Enrollment Period, which is expected to run from October 15 through December 7, 2026, for benefits beginning January 1, 2027. During that window, you may join, switch, or leave a Medicare Advantage plan and return to Original Medicare, subject to plan and prescription drug choices.
The Medicare Advantage Open Enrollment Period, generally January 1 through March 31, 2027, gives current MA members one additional opportunity to make a qualifying change. Certain life events, such as moving outside a plan’s service area, losing other coverage, or qualifying for Extra Help, can create a Special Enrollment Period at other times. Before acting, review the plan’s provider network, drug formulary, monthly costs, and prior-authorization rules.
CMS sets federal enrollment policy and publishes official guidance, but local counseling events and licensed advisers can help explain how those rules apply to the plans available in your county.