We are having issues with knowing when to add a 25 modifier or not. A pt comes in asking about a lesion on the leg and ends up having a full skin exam, we do a biopsy and we perform cryotherapy on a different lesion found during the exam. We attach 238.2 to the biopsy 11100 and 702.0 to the cryo 17000. The charge comes through with the e/m 99203 or 99213 with diagnosis of 238.2 and 702.0. Should we add a modifier 25 or because both of both diagnosis codes were treated and billed for are the charges for an e/m included in the biopsy and cryo codes? Would we need another diagnosis attached to the e/m that did not have something performed on it?
diagnosis codes, diagnosis coding