Is There An Enrollment Period For Medigap? 
No . Medicare Supplement , also known as Medigap , plans have no enrollment period . However if you are currently enrolled in a Medicare Advantage plan , you will have to wait for one of the times you can unenroll before you can enroll in the Medigap plan . There are some times that are better to enroll in a Medigap plan . When you are both 65 and newly enrolled in Medicare part B , you have a period of time when you can pick any plan regardless of your health conditions . In some states , you 're allowed to change plans during the month of your birthday . 