Medicare excess charges are a fee of up to 15% on top of the Medicare-approved amount for Medicare-covered services. This fee is only charged by certain physicians who do not accept Medicare Assignment. There are some states in the U.S. that do not allow physicians to charge this fee. However, Maryland is not one of those states. Only a small number of physicians in Maryland charge this additional fee. However, it is important to know whether your doctor accepts Medicare Assignment. Before receiving services, speak with your doctor and understand if you may encounter excess charges in the future.