CPT® Code 11603

The CPT® Code 11603 refers to the excision of a malignant lesion located on the trunk, arms, or legs, with an excised diameter ranging from 2.1 to 3.0 cm. This procedure involves the surgical removal of a cancerous growth along with a margin of surrounding healthy tissue to ensure complete excision of the malignancy. Common types of malignant lesions that may be excised using this code include basal cell carcinoma, squamous cell carcinoma, verrucous carcinoma, and melanoma. The process begins with the cleansing of the affected area, followed by the administration of a local anesthetic to minimize discomfort during the procedure. A full-thickness incision is then made through the dermis, encircling the lesion to facilitate its complete removal. 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 subsequently sent to a laboratory for histologic evaluation, which is also reportable separately. Hemostasis is typically achieved through electrocautery or chemical cautery methods. After the lesion is excised, the surgical wound may be closed using a simple single-layer suture technique; however, 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.