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Medicare enrollment timeline calculator
Estimate the seven-month Initial Enrollment Period that generally surrounds your 65th birthday. This tool uses only birth month and year, not your full date of birth.
Other important enrollment periods
Annual Open Enrollment: October 15–December 7 for Medicare Advantage and Part D changes, generally effective January 1.
Medicare Advantage Open Enrollment: January 1–March 31 for eligible people already in a Medicare Advantage plan, with limited changes.
Other enrollment periods depend on your circumstances. See more important dates.