Home/Glossary/Plan DisenrollmentGlossary · EnrollmentPlan DisenrollmentLeaving a Medicare Advantage or Part D plan. Allowed only during specific windows (AEP, MA-OEP, SEPs).Related TermsInitial Enrollment Period (IEP)Annual Election Period (AEP)General Enrollment PeriodSpecial Enrollment Period (SEP)Medicare Advantage Open Enrollment (MA-OEP)SHIPLate Enrollment PenaltyCOBRA← Back to glossary index