Summary & Overview
CPT 21155: LeFort III Midface Reconstruction with Microsurgery and Bone Grafting
CPT code 21155 designates extensive LeFort III midface reconstruction performed in association with a LeFort I procedure, utilizing microsurgery and bone grafting to correct complex craniofacial deformities such as Apert and Crouzon syndromes. This code captures high-complexity craniofacial surgery typically delivered in inpatient hospital settings or specialized ambulatory surgical centers and is relevant to surgical teams, hospital administrators, and payers managing coverage for congenital and acquired facial deformity reconstruction.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for CPT code 21155, typical sites of service, and the procedural scope. The publication provides national benchmarks for utilization and coverage trends where available, summaries of relevant policy and billing considerations, and comparisons to related reconstructive procedure codes. Clinical context explains when LeFort III midface reconstruction is indicated and the multidisciplinary resources required. Policy and billing sections outline common documentation elements and procedural complexity factors that influence payer adjudication. Data not provided in the input (such as specific ICD-10 pairings or payer-specific reimbursement rates) is noted as unavailable.
Billing Code Overview
CPT code 21155 describes extensive midface reconstruction performed as part of a LeFort III procedure in association with a LeFort I osteotomy. The procedure involves microsurgical techniques and bone grafting to correct complex acquired or congenital craniofacial deformities, such as Apert syndrome or Crouzon syndrome.
-
Service type: Complex craniofacial reconstructive surgery involving LeFort III midface advancement with microsurgery and bone grafting
-
Typical site of service: Inpatient hospital or specialized ambulatory surgical center equipped for complex craniofacial and microsurgical procedures
Clinical & Coding Specifications
Clinical Context
A pediatric patient with syndromic midface hypoplasia (for example, Crouzon syndrome) presents with severe midfacial retrusion, obstructive sleep apnea, and malocclusion. The multidisciplinary team — craniofacial surgeon, pediatric otolaryngologist, anesthesiologist, and plastic surgery microsurgery team — evaluates the patient preoperatively with 3D CT imaging, airway studies, orthodontic assessment, and speech/feeding evaluations. The planned operation is combined: a LeFort III midface advancement with concurrent LeFort I maxillary osteotomy and microsurgical reconstruction using autologous bone grafts to correct congenital craniofacial deformity, restore midface projection, improve airway patency, and optimize occlusion.
Preoperative workflow includes detailed informed consent, anesthesia assessment for potential difficult airway, blood product planning, and arrangement for intraoperative neuromonitoring if indicated. Intraoperative workflow involves simultaneous teams performing osteotomies, mobilization of midface segments (LeFort III), LeFort I adjustments, placement of bone grafts and fixation, and microvascular anastomosis if free vascularized bone is required. Postoperative care includes ICU monitoring for airway compromise, pain control, swallow and speech assessments, and staged orthodontic follow-up and possible revision procedures.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the procedure requires substantially greater work or time than typical due to extensive reconstruction or unexpected complexity. |