If you are newly entitled or enrolled in Medicare, you may enroll during your initial enrollment period for Medicare.  If you do not join during this period, your next chance to join will be during the annual coordinated election period (AEP) between November 15 and December 31 each year.  There will also be special enrollments periods (SEPs) if you lose your employer-based coverage, move from your prescription drug provider's (PDP) or Medicare-Advantage Plan that offers prescription drug coverage (MA-PD) service area and when a provider goes out of business or is decertified by Medicare.

For assistance in selecting a plan and enrolling, go the Medicare Prescription Drug Plan Finder, a Web site of the Center for Medicare and Medicaid Services (CMS).