Are you sure you are not overpaying?? Why not allow it go through the insurance discount via the contractual agreement?
I see EOB's everyday. Just had one for a x-ray in a urgent care. They billed $76 and the insurance company allowed $28via the contractual agreement with the doctor so that was all what the member had to pay.
I want the doctor to be available if I should need his services. I do not believe in mooching, and pay my own way ever where I go.