I am conducting an audit and being told by the TPA that when a hospital bills for a radiology procedure for example, that it is "understood" that it is for the technical component only. They don't need to add the modifier TC. I am seeing many instances of what appears to be global billing by the hospital and the professional component by the physician. I am considering this to be double billing of the professional component. Has anyone heard of this "understood" rule about modifier TC by a hospital?