Even though they do not accept assignment, their charges are limited to 15% in excess of the Medicare approved charges.Just so this doesn't get lost. There are 3 types of providers for Medicare billing:
3. Excess Charge Providers. They do not accept assignment AND have not legally opted-out. Usually they file claims and wait on payment from the carriers if the insured has Plan F or G. If its N, its not covered. Sometimes, they want their "excess" money upfront. In reality, they can do whatever they want. Had 2 claims in TX in 20+ years. But in Arizona, Mayo Hospitals do not accept assignment and you better have G or its going to be ugly.