One of four periods during which an individual can enroll in Medicare Part A. TEP is for people age 65 or older who have Part B only and are enrolled in a Medicare managed care plan. They can sign up for Medicare Part A during any month they leave the plan or if the plan coverage ends, they have 8 months to sign up. The 8 months start the month after the month they leave the plan or the plan coverage ends. If they enroll in Part B or Part A during the general enrollment period (GEP), the coverage starts on July 1. Also see initial enrollment period (IEP), general enrollment period (GEP) , and special enrollment period (SEP) .