Why Did I Get A Bill For An Endoscopy When I Have Medicare And A Supplment? 
For an endoscopy Medicare would only pay 80 % not 100 % . An endoscopy is a diagnostic test and is paid under Medicare Part B . If you had already met your yearly Part B deductible -LRB- $ 147 for 2015 or $ 166 for 2016 -RRB- you should owe nothing for the test . Make sure the doctor who performed the endoscopy submitted a claim to your Medicare Supplement Plan . 