Father and son are in the same office now, but they are still totally separated--the son owns a dexa scanner--the father wants his pts to have the dexa scan by his son's dexa--would the son bill the dexa with a TC modifier and the father bill the 26 modifier by reading it? I am totally confused on how to bill this one. My instincts tell me to bill it this way--but is there a better and correct way to do it?