CPT® Code 21151

The procedure described by CPT® Code 21151 involves the surgical reconstruction of the midface using a LeFort II osteotomy technique, which is specifically indicated for patients with facial bone deformities. This complex procedure targets the pyramidal nasoorbitomaxillary region, which encompasses several critical anatomical structures, including the frontal process of the maxilla, the nasal bone, the total nasal cartilaginous complex, and the infraorbital rim. The LeFort II osteotomy is characterized by its ability to reposition the midface, which may be necessary due to congenital deformities, trauma, or other pathological conditions affecting facial structure and function. During the procedure, the surgeon makes both intraoral and external incisions to gain access to the facial bones. The surgical approach may involve the extraction of premolars and last molars to facilitate access and minimize trauma to surrounding tissues. The palatal mucosa is carefully tunneled to avoid tearing during the osteotomy, ensuring that the integrity of the oral cavity is maintained. The procedure requires meticulous dissection and exposure of the nasal cavity and surrounding structures, allowing for precise measurements and planning of bone cuts. The reconstruction process includes detaching the periorbita, performing medial and lateral orbital osteotomies, and mobilizing the facial bones to correct the deformity. If necessary, bone grafts are harvested from the iliac crest to support the reconstruction, which adds another layer of complexity to the procedure. The use of fixation devices, such as wires, miniplates, or screws, ensures that the repositioned bones and any grafts are securely held in place, promoting optimal healing and alignment. This comprehensive approach to midface reconstruction is essential for restoring both aesthetic appearance and functional integrity to the facial structure.