overbilling by anesthesiologist. what right do I have to complain or have this company investigated

My wife works at a hospital whose policy (employee newsletter documents this) that a medical treatment that occurs at the companys hospitals or clinics will waive any copay or deductible. She had a recent operation at the same hospital where she works and needed a general anesthetic - a single injection was given and then we never saw that person again. The anesthesiology consulting company is attempting to charge her $94.80 (the insurance company already paid them the presumably customary fee of 565.20) We've had quite a few conversations with her medical insurance company (UHC) and pointed out page 3 of the employee newsletter dated June 2008 states "The hospital  will waive any copays applied" and they seem to have stopped trying to charge us for the other bills (several hundred dollars) for other parts of the treatment. Only this anesthesia consultants company still seems greedy and has hired a collections agency.

This seems like billing fraud to me. Is a medical degree a license to print money, or destroy your credit if you refuse to pay up. Or do we have any rights here?

Many of her coworkers say that this is common practice there at that facility. Is this fraud or are doctors GOD and can charge whatever they want for their service and destroy the stupid little peons who dare to defy them?