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Official Description

Reconstruction midface, LeFort I; 3 or more pieces, segment movement in any direction, requiring bone grafts (includes obtaining autografts) (eg, ungrafted bilateral alveolar cleft or multiple osteotomies)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 21147 involves the reconstruction of the midface using a LeFort I osteotomy technique, which is particularly relevant for patients with significant facial bone deformities or for cosmetic enhancements. This complex surgical intervention is characterized by the movement of three or more segments of the maxilla, the upper jawbone, in any direction. The procedure necessitates the use of bone grafts, which may include obtaining autografts from the patient’s own body, such as the iliac crest. The LeFort I osteotomy specifically targets the lower maxillary region, situated below the infraorbital nerve and medial to the zygomatic-maxillary suture, allowing for substantial repositioning of the midface. The surgical approach includes careful planning and execution to ensure minimal trauma to surrounding tissues, with specific techniques employed to facilitate the movement of bone segments and the integration of grafts. This procedure is essential for addressing conditions such as ungrafted bilateral alveolar clefts or cases requiring multiple osteotomies, ultimately aiming to restore functional and aesthetic balance to the facial structure.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The LeFort I reconstruction procedure, as described by CPT® Code 21147, is indicated for various conditions and circumstances that necessitate significant alterations to the midface structure. These include:

  • Facial Bone Deformities - Patients presenting with congenital or acquired deformities of the midface that affect aesthetics and function.
  • Cosmetic Enhancements - Individuals seeking surgical intervention for aesthetic improvements in the midface region.
  • Ungrafted Bilateral Alveolar Clefts - Cases where there is a need to reconstruct the alveolar ridge in patients with cleft lip and palate.
  • Multiple Osteotomies - Situations requiring the movement of three or more segments of the maxilla to achieve proper alignment and function.

2. Procedure

The procedure for LeFort I reconstruction involves several detailed steps to ensure successful midface reconstruction. The following outlines the procedural steps:

  • Step 1: Preparation and Anesthesia - The patient is prepared for surgery, and appropriate anesthesia is administered to ensure comfort throughout the procedure.
  • Step 2: Incision and Access - An incision is made in the buccal sulcus, extending from the first molar on one side to the first molar on the opposite side, allowing access to the maxilla.
  • Step 3: Exposure of the Nasal Cavity - The lateral aspect of the nasal cavity is exposed, and the nasal mucosa is elevated to facilitate the osteotomy.
  • Step 4: Marking and Cutting the Maxilla - Using pre-surgical measurements, the physician marks the planned bone cuts in the maxilla. The lateral wall is then cut using a bur, followed by the application of a thin osteotome to fracture the medial and posterior wall of the maxilla.
  • Step 5: Separation of the Pterygoid Plate - The pterygoid plate is separated from the maxilla using a pterygoid osteotome, and the pterygoid hamulus is carefully detached.
  • Step 6: Separation of Nasal Structures - The nasal septum cartilage and vomer are separated from the maxilla using a septal gouge or osteotome, ensuring that the anterior nasal spine is fractured.
  • Step 7: Downfracturing the Maxilla - The maxilla is downfractured using thumb pressure and mobilized with the pterygoid osteotome, allowing for complete detachment.
  • Step 8: Bilateral Anterior Osteotomy - An anterior osteotomy is performed at the premolar region bilaterally, followed by trimming of the nasal septal cartilage, posterior wall, and palatal bone.
  • Step 9: Repositioning and Stabilization - The maxilla is repositioned and stabilized with wires, with careful checks on measurements, lip position, and occlusion to ensure proper alignment.
  • Step 10: Bone Graft Harvesting - Bone grafts are harvested from the iliac crest or another site, with a skin incision made over the iliac crest to expose the bone surface for harvesting.
  • Step 11: Graft Configuration and Placement - The harvested bone is configured to the desired size and shape, and/or cancellous bone is morcellized and placed in the defect.
  • Step 12: Application of Intermaxillary Fixation - An intermaxillary fixation device is applied to maintain the position of the maxilla during healing.
  • Step 13: Closure - The buccal incision is closed, completing the surgical procedure.

3. Post-Procedure

After the completion of the LeFort I reconstruction procedure, patients typically require careful monitoring and follow-up care. Post-procedure care may include pain management, instructions for oral hygiene, and dietary modifications to accommodate healing. Patients are advised to avoid strenuous activities and follow specific guidelines to ensure proper recovery. Follow-up appointments are essential to assess the healing process, check the stability of the bone grafts, and ensure that the maxilla remains in the desired position. Any complications or concerns should be addressed promptly to facilitate optimal recovery.

Short Descr LEFORT I-3/> PIECE W/ GRAFT
Medium Descr RCNSTJ MIDFACE LEFORT I 3/> PIECE W/BONE GRAFTS
Long Descr Reconstruction midface, LeFort I; 3 or more pieces, segment movement in any direction, requiring bone grafts (includes obtaining autografts) (eg, ungrafted bilateral alveolar cleft or multiple osteotomies)
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 161 - Other OR therapeutic procedures on bone
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
GC This service has been performed in part by a resident under the direction of a teaching physician
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Notes
2013-01-01 Changed Description Changed
2011-01-01 Changed Short description changed.
2009-01-01 Changed Code description changed
1991-01-01 Added First appearance in code book in 1991.
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