Specialty
Dermatology Medical Billing
Lesion sizing, margins and the medical-necessity line between treatment and cosmetics.
What makes dermatology billing different
Dermatology billing is measurement-driven. Excision codes are selected by lesion diameter plus the narrowest margins, measured before excision, and the measurement has to be in the note. Reconstructing it afterwards from a pathology report gives the wrong figure, because tissue shrinks.
The second theme is multiplicity. A visit frequently involves several lesions at several sites with several methods, and correct separate reporting depends on modifiers that are easy to apply wrongly in either direction.
Lesion size documented after the fact
Size plus margins must be recorded pre-excision. Using the pathology measurement systematically undersizes the code.
Benign versus malignant sequencing
Excision code selection depends on the pathology result, so the claim should wait for it. Billing early and correcting later creates avoidable rework.
Destruction versus excision versus biopsy
17000-series, 11400-series and the 11102-series biopsy add-ons are distinct families. Mixing them is a common and expensive error.
Cosmetic versus medically necessary
The documentation has to establish functional impairment or malignancy risk. Without it the service is patient responsibility and needs to be handled as such up front.
Ask any billing company this
“How do you handle claims where pathology has not resulted yet?”
A company that bills your specialty properly will answer this in one sentence. A company that treats every specialty the same will answer it with a brochure.A note on accuracy. Coding rules, coverage policies and payer edits change continually, and the specifics above reflect general practice rather than any individual payer contract or local coverage determination. Treat this page as a map of where to look, not as coding advice for a particular claim.