Dermatology Coding Alert
238.2: Code Original Excision Dx
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Question: A patient comes in for a re-excision of a dysplastic nevus. Do I bill the re-excision using a benign or malignant ICD-9?
Colorado Subscriber
Answer: First, check the pathology report from the original biopsy and make sure it states "dysplastic nevus." If the biopsy showed a dysplastic lesion, then the diagnosis is benign, and you should report the diagnosis as 238.2 (Neoplasm of uncertain behavior of skin).
With that diagnosis, you should code the re-excision using a code from the series 11400-11446 (Excision, benign lesion ...) based on lesion’s site and size.
Important: If you have a previous malignant lesion diagnosis and the surgeon performs a re-excision because there was a concern about clear margins from the first excision, use the original diagnosis code and the same family of lesion excision codes, even if the pathology subsequently comes back as benign.
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