Summary & Overview
CPT 21147: LeFort I Midface Reconstruction with Maxillary Advancement
CPT code 21147 denotes a LeFort I midface reconstructive procedure in which the maxilla and related facial bones are mobilized, advanced, and reconstructed using microsurgical techniques and bone grafting. This code captures complex orthognathic and reconstructive surgery performed to correct congenital deformities, trauma, or acquired defects that affect occlusion and facial form. Nationally, accurate coding and billing for this procedure matters because it informs surgical quality measurement, determines facility and professional payment pathways, and affects access to definitive reconstructive care.
Key payers referenced in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication summarizes coverage patterns, typical sites of service, and common billing considerations across public and major commercial payers.
Readers will learn: the clinical context and procedural elements represented by CPT code 21147; common sites where the service is delivered; the principal payers that cover this service; and the types of benchmarks and policy updates relevant to complex maxillofacial reconstruction. Data not available in the input is noted where applicable, and the report focuses on national-level interpretation rather than state-specific policy.
Billing Code Overview
CPT code 21147 describes a LeFort I midface surgical procedure in which the surgeon reconstructs and repositions the maxilla (upper jaw) and associated facial bones. The procedure uses microsurgical techniques and bone grafting to correct congenital or acquired deformities by moving the teeth-bearing portion of the maxilla forward and securing the reconstructed bone segments.
Service type: Open reconstructive maxillofacial surgery (LeFort I osteotomy) with bone grafting and microvascular techniques.
Typical site of service: Inpatient hospital operating room or ambulatory surgical center depending on clinical complexity and post-operative care needs.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 22-year-old with maxillary hypoplasia and class III malocclusion following congenital cleft palate repair. The patient presents with facial imbalance, malocclusion causing masticatory dysfunction, and nasal airway compromise. Preoperative planning includes orthodontic alignment, 3D imaging (CBCT), surgical planning with virtual occlusal splints, and multidisciplinary consultation with oral and maxillofacial surgery, orthodontics, and otolaryngology. The procedure is performed in an operating room under general anesthesia with nasotracheal intubation. The surgeon executes a LeFort I osteotomy, mobilizes the maxilla, advances and repositions the teeth-bearing segment, secures it with plates and screws, and often places autogenous bone grafts or microsurgical vascularized grafts to augment defects. Intraoperative attention includes hemostasis, occlusal verification with splints, and possible concurrent septoplasty or alar base modification. Postoperative workflow includes monitored recovery in PACU, admission for airway and pain management, diet advancement with liquid/soft foods, follow-up imaging, and staged orthodontic finishing. Typical sites of service are hospital inpatient or outpatient surgery center depending on complexity; cases involving microsurgical grafting or airway concerns more commonly require hospital inpatient admission.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |