I have physicians telling me that they have been told in the past that they can bill an E/M with a derm procedure such as wart destruction or lesion excision. (One says it's always a 99213.) I would agree an E/M would be warranted if it's a new patient and understand that the E/M should be "separate". I've used the 25 modifier description. Does anyone have any good references where I can get information to use as an education tool to define "separate"? I've explained about services unrelated or "above and beyond" the procedure but they would understand better if I had concrete proof. (Or maybe they'd believe me...) Any tips or ideas?