A: If you are turning age 65, you can join Part D in your Initial Enrollment Period, the seven months surrounding your birthday month. If you already have Medicare, you can join Part D every fall from October 15 through December 7. The plan starts Jan. 1. If you have never had Part D drug coverage, or you have had drug coverage which was not as good as Part D, you may have to pay a late-enrollment penalty. You also may have special enrollment periods to join Part D at other times in the year, such as if you lose creditable coverage, move, or if you receive Extra Help such as the Medicare Savings Programs or Medicaid.
Under age 65 and starting Medicare for disability?
If yes, you can join Part D plans during the seven months around your Medicare effective month.