Can anyone tell me if Medicare claims must be filed by the doctor? I will have to go on Medicare my next birthday and my present ins. becomes the secondary payer. Our doctor doesn't file insurance claims, we pay at the time of service and receive a discount. He does give us the completed and signed forms which we send in and and receive payment directly from our ins co. I sure would hate to have to find a different doctor, this one has finally got me straightened out and feeling pretty good. But, my ins. won't pay anything until Medicare does so I may have to change, I can't afford to pay it all out of pocket.