I'm an audiologist and, while we are permitted to bill for several tests on the same day, we are strickly forbidden from billing for separate visits. Especially Medicare. They are the most difficult ones to work with. Our medicare + supplementals rarely pay anything (we had one who supplemental said they owed $6). I suppose it is different, anyway, for physicians. And maybe I'm missing something as I'm not a professional biller! I'm scared of the insurance companies myself. . .