Can I Be Denied Medigap Coverage? 
You can be denied Medigap coverage if you have serious pre-existing health conditions . Once your Part B Medicare coverage is activated at age 65 or older , you have six months to enroll in a Medicare Supplement without having to answer any health questions . After your Open Enrollment Period ends you can enroll in a Medigap Plan at anytime , but you could pay a higher rate or be denied coverage for serious health problems . 