During certain times of the year, an individual can enroll in a plan that
best suits their healthcare needs. Specific requirements apply.
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Enrollment Periods Based on Special Circumstances:
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Initial election periods when beneficiary first eligible for Medicare
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Special enrollment periods (SEPs) when special circumstances arise
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Continual open enrollment for institutionalized individuals
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Initial Coverage Election
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Annual Enrollment
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Open Enrollment​
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Special Enrollment
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Annual Enrollment/Disenrollment Periods:
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Annual Election Period "October 15 - December 7" (AEP)
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Open Enrollment Period "January 1 - March 31" (OEP)
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Medicare Advantage and Part D Enrollment Periods:
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MA Initial Coverage Election Period (ICEP)
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Part D Initial Enrollment Period (IEP)
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MA and Part D Annual Election Period (AEP)
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MA and Part D Special Enrollment Periods (SEP)
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Open Enrollment Period for Institutionalized Individuals (OEPI)
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MA Open Enrollment Period (OEP)
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​Cost Plan Enrollment:
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Cost plans are required to be open to enrollment at least 30 days per year. Many cost plans are open for enrollment all year.
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Cost plans may be, but are not required to be, open for enrollment during the MA Annual Election Period, but Cost plans that offer an optional supplemental Part D benefit must accept Part D enrollments during the AEP
