Is There An Enrollment Period For Medigap? 
When you first enroll in Medicare Part B at age 65 or older you will be in your initial Medicare Open Enrollment Period to purchase a Medicare Supplement . You have six month from when your Part B takes effect to enroll in a Medicare Supplement without having to answer any health questions . Your acceptance is guaranteed and pre-existing health conditions are covered immediately with no waiting period . You can purchase a Medicare Supplement anytime you want to outside of your initial Open Enrollment Period but once your Open Enrollment Period ends you will have to answer all health questions to qualify for a Medicare Supplement . If you have a serious health condition you could be denied coverage or have to pay a much higher premium to get the pre-existing health condition covered . 