CPT® Code 23156

The CPT® Code 23156 refers to the procedure of excision or curettage of a bone cyst or benign tumor located in the proximal humerus, specifically when this is performed with the use of an allograft. A bone cyst is defined as a fluid-filled space within the bone, which can vary in type. The unicameral or simple bone cyst is a common benign lesion, while the aneurysmal bone cyst is less common and characterized by vascular tissue surrounding a blood-filled cystic lesion. Additionally, there are various types of benign bone tumors, including giant cell tumors, chondromyxoid fibromas, and enchondromas. The procedure involves making an incision over the lesion site in the proximal humerus, 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 in the proximal humerus is filled with donor bone (allograft), which is essential for the healing process and structural integrity of the bone.