CPT® Code 11600

The CPT® Code 11600 refers to the excision of a malignant lesion located on the trunk, arms, or legs, where the excised diameter of the lesion is 0.5 cm or less. This procedure involves the surgical removal of the malignant tissue along with a margin of healthy tissue to ensure complete excision of the cancerous cells. 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 during the excision. A full-thickness incision is made through the dermis, encircling the lesion to remove it entirely. To confirm that the excised margins are free of malignant cells, a frozen section may be performed during the procedure. If any malignant tissue is detected at the margins, additional tissue will be excised until clear margins are achieved. The excised lesion is then sent to a laboratory for histologic evaluation, which is separately reportable. Hemostasis is achieved through electrocautery or chemical cautery, and the surgical wound may be closed using a simple single-layer suture technique. In some cases, more complex closure methods such as intermediate (layer) closure, complex repair, skin grafts, or pedicle flaps may be employed. This code is specifically designated for lesions with an excised diameter of 0.5 cm or less, with additional codes available for larger excised diameters.