CPT® Code 21436

Open treatment of craniofacial separation (LeFort III type); complicated, multiple surgical approaches, internal fixation, with bone grafting (includes obtaining graft)

The CPT® Code 21436 refers to the open treatment of a craniofacial separation, specifically a LeFort III type fracture, which is characterized as complicated and involves multiple surgical approaches, internal fixation, and the use of bone grafting. A Le Fort III fracture, also known as craniofacial separation or dysjunction, is a significant and complex injury that affects the midface region. This type of fracture initiates at the nasofrontal and frontomaxillary sutures and extends posteriorly through various anatomical structures, including the medial wall of the orbit, the nasolacrimal groove, and the ethmoid bones. The fracture pathway continues along the floor of the orbit at the inferior orbital fissure and traverses through the lateral orbital wall, zygomaticofrontal junction, and zygomatic arch. Additionally, a branch of the fracture may extend through the base of the perpendicular plate of the ethmoid and vomer, as well as the interface of the pterygoid plates to the base of the sphenoid. The treatment of such complicated fractures necessitates multiple surgical approaches to ensure proper alignment and stabilization of the fractured segments. The procedure includes obtaining a bone graft, which is essential for enhancing the stability of the fractured bone fragments. The use of bone grafting is particularly important in cases where the fracture is comminuted or involves critical structures such as cranial nerve foramina, thereby necessitating meticulous surgical intervention to restore anatomical integrity and function.