when do i sign up for medicare part a
1 When you turn 65 (and have no other drug coverage that is as good as Medicare), you need to join a Part D drug plan during the 7-month initial enrollment period when you can sign up for Medicare Part A and Part B. This period runs from three months before the month of your 65th birthday to three months after it.f your coverage is not creditable, you can still keep it. But if you sign up for a Medicare drug plan at some future date, and you have gone for more than 63 days without creditable coverage, you would then pay a late penalty.