annual coordinated election period (ACEP) or annual election period
DEFINITION: Annual coordinated election period (ACEP) or annual election period refers to the period of time between October 15 and December 7 during which you can change your Medicare prescription drug coverage or your Medicare Advantage plan (including switching from Original Medicare to a Medicare Advantage plan). ACEP is also the period of time during which you can enroll in Medicare Part D, if you missed your Initial Enrollment Period.
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