Can You Be Denied Medicare Supplemental Insurance? 
There are specified `` guarantee issue '' situations where a supplemental Medicare insurance carrier can not refuse coverage . Most people will buy a Medicare supplement plan at the same time they enroll in Medicare Part A and Part B which is usually when they turn 65 . If you buy a supplement plan then , you can not be denied . Other guaranteed issue periods include exercising your trial right when leaving a Medicare Adantage plan , losing your Advantage plan coverage by moving out of the service area and if your current Medigap carriar goes out of business or stops writing your plan . 