Since in the cpt manual, 45378 doesn't say " screening" in the description should modifier 33 be added? Or does it only need to be added if the procedure becomes therapeutic? Medicare's G0121/G0105 specify "screening" in the description and the PT only has to be added if you use a therapeutic code so that's straightforward. I've found conflicting information for 45378 though. I don't want a patient to be charged when they shouldn't have been.