When Does Medigap Start? 
Medicap is the AEP annual open enrollment period for Medicare . This enrollment period begins on October 15th , 2014 and lasts through December 7th , 2014 . People enrolled in Medigap policies may make changes to their current plan during this time . Or , if you are not currently enrolled in a supplemental plan , you may enroll for a Medicap Supplemental policy or a Prescription Drug plan -LRB- PDP -RRB- during the AEP -LRB- annual enrollment period -RRB- . 