I'm confused with pre-op exam diagnoses. if a pt is having a gyn surgery and needs an ekg, does that fall under V72.81 (pre-op cardio exam since we're doing the ekg) or should it fall under V72.83 (other specified pre-op exam since the surgery is gyn)? I guess what I'm questioning is if these codes are supporting what was done at the pre-op visit or what the surgery is for. let me know if I need to clarify better and I'll try to figure out how to do it. thanks!