CPT® Code 28103

The CPT® Code 28103 refers to the surgical procedure involving the excision or curettage of a bone cyst or benign tumor located in the talus or calcaneus, which are bones in the foot. A bone cyst is defined as a fluid-filled space within the bone, and it can manifest in various forms. The unicameral or simple bone cyst is a common type, characterized as a benign lesion. Another type, the aneurysmal bone cyst, is less common and consists of vascular tissue surrounding a blood-filled cystic lesion. Additionally, benign bone tumors can include giant cell tumors, chondromyxoid fibromas, and enchondromas. The procedure begins with an incision made over the lesion site in the talus or calcaneus, 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 bone is filled with donor bone (allograft), which is sourced from a separate donor site, ensuring the structural integrity and healing of the affected area.