I have met my Medicare deductible. I have plan G Medicare supplement which pays all co-pays, etc. I am being billed by a doctor’s office in spite of the fact that I have no further liability for co-pays. What is the best way to resolve this as the doctors office keep sending me a bill.

Location: Indiana I have just been informed that my son's great grandma (who has never ever had her address used for our Medicare nor been approved to know anything about his or my medical info) has been receiving all of our Medicare information. I have over 5 letters for both him and I in regards to our benefit explanations, they even stopped his benefits and I had no idea!!! I'm upset because he has an upcoming appointment very soon for his 18 month check up and I don't even know if he will be covered by then. I have no idea how they even got her address. She recently moved, and I didn't even know her new address. But somehow, they have all went to her. I'm so confused as to how this has happened?! And I'm really mad that she had (if she chose to open the mail, but she did not open any of it) complete access to our information like that. What can I do about this? I plan on calling Medicare tomorrow but I really think this is a huge issue and I'm pissed honestly.