CPT® Code 11643

A malignant lesion refers to an abnormal growth of cells that can invade surrounding tissues and potentially spread to other parts of the body. In the context of CPT® Code 11643, this procedure specifically involves the excision of such lesions located on the face, ears, eyelids, nose, lips, or mucous membranes. The excision is performed with the inclusion of a margin of normal tissue to ensure that all cancerous cells are removed, which is critical for preventing recurrence. Common types of malignant lesions that may be excised using this code include basal cell carcinoma, squamous cell carcinoma, verrucous carcinoma, and melanoma. The procedure begins with the cleansing of the area and the administration of a local anesthetic to minimize discomfort. A careful assessment is made to identify a margin of healthy tissue surrounding the lesion, and a full-thickness incision is executed through the dermis. The incision is designed to encircle the lesion, allowing for complete excision. In some cases, a frozen section may be performed during the excision to verify that the margins are clear of malignant cells. If any malignant tissue is detected at the margins, further excision is necessary until all margins are confirmed to be clean. The excised lesion is then sent for histologic evaluation to determine the nature of the tissue. To manage any bleeding that may occur during the procedure, electrocautery or chemical cautery techniques are employed. Finally, the surgical wound may be closed using a simple single-layer suture technique, although more complex closure methods such as intermediate (layer) closure, complex repair, skin grafts, or pedicle flaps may also be utilized depending on the specific circumstances of the excision.