ASC Facility
Usually when you go into an ASC facility you are scheduled for surgery, The E/M is usually done with their doctor before they go to the ASC facility.
Did the doctor do a full E/M on this patient before going into sugery? they may also be considering it as a pre-op. I would need a little more info to determine denial reason.
What kind of surgery was performed? Major, minor?
Misty CPC, COC