The company I work for does Xrays in our lab, but we only provide the technical component. The images are sent to a radiology group to be read. There is a bit of debate regarding the FY modifier. Would the FY modifier be used with the TC modifier or does it replace the TC modifier. It seems to me since we are not billing for the global service, we would still have to use the TC modifier. Am I reading all of the information wrong? Please help.