CPT® Code 23146

The CPT® Code 23146 refers to the excision or curettage of a bone cyst or benign tumor located in the clavicle or scapula, specifically when the procedure involves the use of an allograft. A bone cyst is defined as a fluid-filled space within the bone, which can vary in type. One common type is the unicameral or simple bone cyst, recognized as a benign lesion. Another type, the aneurysmal bone cyst, is characterized by vascular tissue that surrounds a blood-filled cystic lesion. Additionally, there are various benign bone tumors, including giant cell tumors, chondromyxoid fibromas, and enchondromas. The procedure begins with an incision made over the lesion site on the clavicle or scapula, followed by dissection of the soft tissues to expose the lesion. If a cystic lesion is identified, the bone is incised to create a window, allowing for the aspiration of fluid, which is then sent for laboratory analysis. The lining of the cystic cavity is removed using a curette. In cases where benign tumors are present, the lesion is excised along with a margin of healthy bone. Following the excision or curettage, the defect created is filled with donor bone (allograft), which is essential for the healing process and structural support of the affected area.