Why Did I Get A Bill For An Endoscopy When I Have Medicare And A Supplment? 
Assuming you have both Medicare Part A and Part B -LRB- together this is known as `` original Medicare '' -RRB- , these two parts pay for approximately 80 % of diagnostic procedures . If you do not have a Medicare Supplement plan , then you may be responsible for the other 20 % of the expense -LRB- if the doctor does not take `` assignment '' -LRB- meaning the doctor accepting the Medicare-approved amount as payment in full -RRB- . If you had a Medicare Supplement plan , the 20 % of expenses you would normally be responsible for may be fully covered , depending on which Medicare Supplement plan you have . There area 11 different Medicare Supplement plans available in the marketplace - plans F and G being the most comprehensive . Please note , if you do have a Medicare Supplement plan , when you visited the endoscopy center , both the Medicare ID card and Medicare Supplement ID card should have been presented to the receptionist -LRB- or whomever handles billing at the facility -RRB- so the facility could bill Medicare and then the insurance company for the difference -LRB- if you had a Medicare Supplement plan that was not a plan F , you may be responsible for an extra amount -LRB- to an extent - again , depending upon the plan letter you have -RRB- -RRB- . I hope the information is helpful - please feel free to contact me if you have any other questions or would like to consider securing a Medicare Supplement plan . Even if you have a Medicare Supplement plan , a lower rate may be available to you without affecting the existing benefits or you may be able to improve upon what you have - Medicare Supplement plans are standardized so the coverage is the same for a given plan letter , regardless of the insurance company the coverage is through . 