CPT® Code 17315

Add-On Code

Mohs micrographic technique, including removal of all gross tumor, surgical excision of tissue specimens, mapping, color coding of specimens, microscopic examination of specimens by the surgeon, and histopathologic preparation including routine stain(s) (eg, hematoxylin and eosin, toluidine blue), each additional block after the first 5 tissue blocks, any stage (List separately in addition to code for primary procedure)

The Mohs micrographic technique, as described by CPT® Code 17315, is a specialized surgical procedure designed for the precise removal of skin cancers, particularly basal cell carcinoma and squamous cell carcinoma. This technique is unique in that it combines surgical excision with immediate microscopic examination, allowing the surgeon to act as both the operator and the pathologist during the procedure. The process involves the meticulous removal of cancerous tissue in thin layers, which are then subjected to histopathologic preparation, including routine staining methods such as hematoxylin and eosin or toluidine blue. This dual role of the surgeon enhances the accuracy of tumor removal, ensuring that all gross tumor is excised while preserving as much healthy tissue as possible. The procedure is characterized by its high recovery rate, making it a preferred choice for treating complex or ill-defined skin cancers. The color coding and mapping of the excised specimens facilitate the identification of any remaining cancer cells, thereby guiding further excision if necessary. It is important to note that CPT® Code 17315 specifically pertains to the reporting of each additional tissue block after the first five blocks, which are accounted for under separate codes for the primary procedure stages.