When you first become eligible for Medicare which is often when you turn 65 — 3 months before or after your 65th birthday or initial Medicare eligibility.

If you are currently on Medicare — Between October 15 and December 7 for a January 1 effective date.

Anytime under special circumstances, such as if you move out of your plan’s service area or if you lose your group coverage.

Medicare Advantage plans are available to anyone that is entitled to Medicare Part A and enrolled in Part B.