General Enrollment Periods
INITIAL ENROLLMENT PERIOD (IEP)
The seven-month period when individuals are first eligible for Medicare. It is the three months before they turn 65, their birth month, and the three months following their birth month.
PART B GENERAL ENROLLMENT PERIOD (GEP)
If initial enrollment is missed, eligible Medicare beneficiaries can sign up for Medicare Part B between January 1 and March 31 each year.
OPEN ENROLLMENT PERIOD (OEP)
October 15 – December 7 each year. During this time, Medicare beneficiaries can switch from Original Medicare to a Medicare Advantage plan (with or without Part D included), enroll in a Part D plan, disenroll from Part D, or switch Part D plans.
MEDICARE ADVANTAGE DISENROLLMENT PERIOD (MADP)
January 1 – February 14 each year. Medicare beneficiaries can leave their Medicare Advantage plan and return to Original Medicare and enroll in a stand-alone Part D plan.
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