Clinical UM Guideline |
Subject: Mandibular/Maxillary (Orthognathic) Surgery | |
Guideline #: CG-SURG-84 | Publish Date: 06/28/2024 |
Status: Reviewed | Last Review Date: 05/09/2024 |
Description |
This document addresses medically necessary, reconstructive and cosmetic procedures involving the mandible, maxilla or both, with the exception of orthognathic surgery for the treatment of temporomandibular disorders or obstructive sleep apnea. This document does not apply to temporomandibular disorders, obstructive sleep apnea or orthodontia (braces) services.
Note: Please see the following related documents for additional information:
Note: This document does not address gender affirming surgery or procedures. Criteria for gender affirming surgery or procedures are found in applicable guidelines used by the plan.
Medically Necessary: In this document, procedures are considered medically necessary if there is a significant functional impairment AND the procedure can be reasonably expected to improve the functional impairment.
Reconstructive: In this document, procedures are considered reconstructive when intended to address a significant variation from normal related to accidental injury, disease, trauma, treatment of a disease or congenital defect.
Note: Not all benefit contracts/certificates include benefits for reconstructive services as defined by this document. Benefit language supersedes this document.
Cosmetic: In this document, procedures are considered cosmetic when intended to change a physical appearance that would be considered within normal human anatomic variation. Cosmetic services are often described as those which are primarily intended to preserve or improve appearance.
Clinical Indications |
Medically Necessary:
Mandibular/Maxillary (orthognathic) surgery is considered medically necessary to treat a significant functional impairment when the procedure can be reasonably expected to improve the functional impairment. Significant functional impairment includes any one of the following (I, II, III, or IV below):
*When the condition involves treatment of skeletal deformity, the deformity must be documented either by computed tomography (CT), magnetic resonance imaging (MRI), or x-ray.
Reconstructive:
Mandibular/maxillary (orthognathic) surgery is considered reconstructive when intended to address a significant variation from normal related to accidental injury, disease, trauma, or treatment of a disease or congenital defect.
Cosmetic and Not Medically Necessary:
Mandibular/Maxillary (orthognathic) surgery is considered cosmetic and not medically necessary when intended to change a physical appearance that would be considered within normal human anatomic variation.
A genioplasty (or anterior mandibular osteotomy) is considered cosmetic and not medically necessary when not associated with masticatory malocclusion.
Coding |
The following codes for treatments and procedures applicable to this document are included below for informational purposes. Inclusion or exclusion of a procedure, diagnosis or device code(s) does not constitute or imply member coverage or provider reimbursement policy. Please refer to the member's contract benefits in effect at the time of service to determine coverage or non-coverage of these services as it applies to an individual member.
When services may be Medically Necessary or Reconstructive when criteria are met:
CPT |
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21120-21123 | Genioplasty [includes codes 21120, 21121, 21122, 21123] |
21125 | Augmentation, mandibular body or angle; prosthetic material |
21127 | Augmentation, mandibular body or angle; with bone graft, onlay or interpositional (includes obtaining autograft) |
21141-21147 | Reconstruction midface, LeFort I [includes codes 21141, 21142, 21143, 21145, 21146, 21147] |
21150-21151 | Reconstruction midface, LeFort II |
21154-21155 | Reconstruction midface, LeFort III |
21188 | Reconstruction midface, osteotomies (other than LeFort type) and bone grafts (includes obtaining autografts) |
21193-21196 | Reconstruction of mandibular rami [includes codes 21193, 21194, 21195, 21196] |
21198 | Osteotomy, mandible, segmental |
21199 | Osteotomy, mandible, segmental; with genioglossus advancement |
21206 | Osteotomy, maxilla, segmental (eg, Wassmund or Schuchard) |
21208 | Osteoplasty, facial bones; augmentation (autograft, allograft, or prosthetic implant) |
21209 | Osteoplasty, facial bones; reduction |
21210 | Graft, bone; nasal, maxillary or malar areas (includes obtaining graft) |
21215 | Graft, bone; mandible (includes obtaining graft) |
21244 | Reconstruction of mandible, extraoral, with transosteal bone plate (eg, mandibular staple bone plate) |
21245-21246 | Reconstruction of mandible or maxilla, subperiosteal implant |
21247 | Reconstruction of mandibular condyle with bone and cartilage autografts (includes obtaining grafts)(eg, for hemifacial microsomia) |
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HCPCS |
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D7940 | Osteoplasty - for orthognathic deformities |
D7941 | Osteotomy - mandibular rami |
D7943 | Osteotomy - mandibular rami with bone graft; includes obtaining the graft |
D7944 | Osteotomy - segmented or subapical |
D7945 | Osteotomy - body of mandible |
D7946-D7947 | LeFort I (maxilla - total (maxilla - segmented) |
D7948-D7949 | LeFort II or LeFort III (osteoplasty of facial bones for midface hypoplasia or retrusion) - without/with bone graft |
D7950 | Osseous, osteoperiosteal, or cartilage graft of the mandible or maxilla - autogenous or nonautogenous, by report |
D7995 | Synthetic graft - mandible or facial bones, by report |
D7996 | Implant - mandible for augmentation purposes (excluding alveolar ridge), by report |
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ICD-10 Procedure | |
0NBR0ZZ | Excision of maxilla, open approach |
0NBT0ZZ-0NBV0ZZ | Excision of mandible, open approach [right or left; includes codes 0NBT0ZZ, 0NBV0ZZ] |
0NQR0ZZ | Repair maxilla, open approach |
0NQT0ZZ-0NQV0ZZ | Repair mandible, open approach [right or left; includes codes 0NQT0ZZ, 0NQV0ZZ] |
0NUR07Z-0NUR0KZ | Supplement maxilla, open approach [with autologous tissue, synthetic or nonautologous tissue substitute; includes codes 0NUR07Z, 0NUR0JZ, 0NUR0KZ] |
0NUT07Z-0NUV0KZ | Supplement mandible, open approach [right or left with autologous tissue, synthetic, nonautologous tissue substitute; includes codes 0NUT07Z, 0NUT0JZ, 0NUT0KZ, 0NUV07Z, 0NUV0JZ, 0NUV0KZ] |
0W0407Z-0W050ZZ | Alteration of jaw, open approach [upper or lower with autologous tissue, synthetic, nonautologous tissue or no substitute; includes codes 0W0407Z, 0W040JZ, 0W040KZ, 0W040ZZ, 0W0507Z, 0W050JZ, 0W050KZ, 0W050ZZ] |
0WU407Z-0WU50KZ | Supplement jaw, open approach [upper or lower with autologous tissue, synthetic or nonautologous tissue substitute; includes codes 0WU407Z, 0WU40JZ, 0WU40KZ, 0WU507Z, 0WU50JZ, 0WU50KZ] |
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ICD-10 Diagnosis | |
| All diagnoses, including but not limited to the following: |
M26.00-M26.59 | Dentofacial anomalies [including malocclusion] |
M26.70-M26.9 | Dental alveolar anomalies, other and unspecified dentofacial anomalies |
Q18.4-Q18.5 | Macrostomia, microstomia |
Q67.4 | Other congenital deformities of skull, face and jaw |
R13.11-R13.19 | Dysphagia |
When services are Cosmetic and Not Medically Necessary:
For the procedure and diagnosis codes listed above when medically necessary or reconstructive criteria are not met.
Discussion/General Information |
Orthognathic surgery is the surgical correction of skeletal anomalies or malformations involving the mandible (lower jaw) or the maxilla (upper jaw). These malformations may be present at birth, or they may become evident as the individual grows and develops. Orthognathic surgery can be performed to correct malocclusion that cannot be improved with routine orthodontic therapy and where the functional impairments are directly caused by the malocclusion. The overall goal of treatment is to improve function through correction of the underlying skeletal deformity.
Maxillary advancement is a type of orthognathic surgery that may be necessary to improve the facial contour and normalize dental occlusion when there is a relative deficiency of the midface region. This is done by surgically moving the maxilla with sophisticated bone mobilization techniques and fixing it securely into place.
Depending on the soft tissue profile of the face or the severity of an occlusal discrepancy, problems with the lower face may require surgery of the mandible. This can be performed in conjunction with or separate from maxillary surgery. The mandible can be advanced, set back, tilted, or augmented with bone grafts. A combination of these procedures may be necessary. Following any significant surgical movement of the mandible, fixation may be accomplished with mini-plates and screws or with a combination of interosseous wires and intermaxillary fixation (IMF). Rigid fixation (screws and plates) has the advantage of needing limited or no IMF. However, if interosseous wiring is used, IMF is maintained for approximately 6 weeks.
There is convincing evidence of the relationship between facial skeletal abnormalities and malocclusions, including Class II, Class III, asymmetry, and open bite deformities. A strong correlation has been demonstrated between the state of an individual’s occlusion and their chewing efficiency, bite forces, and restricted mandibular excursions. Orthognathic surgery has resulted in significant improvement in skeletal deformities that contribute to chewing, breathing, and swallowing dysfunction and where the severity of the deformity cannot be corrected through dental therapeutics or orthodontics. Studies have shown that individuals with skeletal malocclusions suffer from a variety of functional impairments. These can include diminished bite forces, restricted mandibular excursions, and abnormal chewing patterns. The evidence in the peer-reviewed literature to support this conclusion includes non-randomized controlled trials and case series studies.
In an educational article published in 2016, the American Academy of Pediatrics stated that the presence of a cleft palate prevents a baby from sucking normally either from the breast or bottle. In addition, children with cleft palates are more likely than other children to have cleft-specific speech problems, and to need orthodontic treatment and orthognathic surgery.
Similarly, the American Society of Plastic Surgeons also stated that orthognathic surgery can treat bite discrepancies, including overbite, underbite, crossbite and/or open bite. Facial imbalances such as asymmetry, upper and/or lower jaw under-development, lower jaw excess, or chin deficiencies and obstructive sleep apnea (2023).
Clinical practice guidance has been published by the American Association of Oral and Maxillofacial Surgeons on criteria for orthognathic surgery (2020). The guidance states the following:
Orthognathic surgery may be indicated and considered medically appropriate in the following circumstances:
These indications relate verifiable clinical measurements to significant facial deformities, maxillary and/or mandibular facial skeletal deformities associated with masticatory malocclusion. In addition to the above conditions, orthognathic surgery may be indicated in cases where there are specific documented signs of dysfunction.
According to Franchi (1998), among a sample of 100 North Americans, the cephalometric mean of the sella–nasion–A point angle (SNA) and sella–nasion–B point angle (SNB) using Steiner’s analysis were found to be 82.98 and 80.37 with a SD of 3.46 and 3.21, respectively. It is important to note that the mean values for cephalometric measurements vary significantly between different ethnic groups (Celebi, 2013; Connor, 1985; Flynn, 1989).
A 2017 Cochrane review compared bioresorbable fixation systems to titanium fixation systems for orthognathic surgery. Two trials, including 103 participants, compared titanium with resorbable plates and screws versus titanium with resorbable screws only. All participants in one trial reported mild to moderate postoperative pain with no statistically significant difference between the two groups. Mean scores of participant satisfaction were also similar (7.43 to 8.63 [range 0 to 10]), with no statistically significant difference between the two groups. Adverse outcomes reported in one study included two plate exposures in each group. Infections were associated with loosened screws and wound dehiscence, with no statistically significant difference in infection rates between groups (titanium 3/196, and resorbable 3/165). The authors concluded that there was insufficient evidence to determine whether titanium plates or resorbable plates are superior for bone fixation. Additionally, the evidence did not show any differences in the other measured outcomes, including postoperative pain, participant satisfaction, plate exposure, or infection rates using either titanium or resorbable materials.
Another Cochrane review, (2018) examined the long‐term results of maxillary distraction osteogenesis compared to orthognathic surgery for hypoplastic maxilla in individuals with cleft lip and palate. Six randomized controlled trials (RCTs) compared maxillary distraction osteogenesis to conventional Le Fort I osteotomy for the correction of cleft lip and palate maxillary hypoplasia in non‐syndromic individuals aged 13-45 years old. The outcomes assessed were hard and soft tissue changes, skeletal relapse, effects on speech and velopharyngeal function, psychological status, and clinical morbidities. Horizontal relapse of the maxilla was less in the distraction osteogenesis group 5 years after surgery. A total forward movement of A‐point of 2.27 mm was noted for the distraction group, whereas a backward movement of 2.53 mm was recorded for the osteotomy group. No statistically significant differences between the groups in speech outcomes, nasal emissions, or velopharyngeal function were identified 17 months postoperatively. Additionally, the distraction group had higher satisfaction 2 years after surgery. Adverse outcomes included occlusal relapse and mucosal infection, with the frequency being similar between groups (3/15 participants in the distraction osteogenesis group and 3/14 participants in the osteotomy group). The authors found that all 6 RCTs related to a single trial performed between 2002 and 2008. This led them to conclude that the evidence is of low quality and that further research may change the estimated effect of distraction osteogenesis. While this method may produce more satisfactory results, further prospective studies with a larger sample size and differing facial characteristics are needed to confirm the findings regarding outcomes between the two intervention techniques.
Definitions |
Anomaly: Deviation from normal.
Anteroposterior: From front to back.
Asymmetry: The lack of balance or symmetry.
Cephalometric: A scientific measurement of the head.
Cephalometrics: The interpretation of lateral skull x-rays taken under standardized conditions. Two of the more popular methods of analysis used in orthodontology are the Steiner analysis and the McNamara analysis.
Class I occlusion: Exists with the teeth in a normal relationship when the mesial-buccal cusp of the maxillary first permanent molar coincides with the buccal groove of the mandibular first molar.
Class II malocclusion: Occurs when the mandibular teeth are distal or behind the normal relationship with the maxillary teeth. This can be due to a deficiency of the lower jaw or an excess of the upper jaw, and therefore, presents two types: (1) Division I is when the mandibular arch is behind the upper jaw with a consequential protrusion of the upper front teeth. (2) Division II exists when the mandibular teeth are behind the upper teeth, with a retrusion of the maxillary front teeth. Both of these malocclusions have a tendency toward a deep bite because of the uncontrolled migration of the lower front teeth upwards. Commonly referred to as an overbite.
Class III malocclusion: Occurs when the lower dental arch is in front of (mesial to) the upper dental arch. People with this type of occlusion usually have a strong or protrusive chin, which can be due to either horizontal mandibular excess or horizontal maxillary deficiency. Commonly referred to as an under bite.
Dentoalveolar: Relating to a tooth and the part of the alveolar bone that immediately surrounds it.
Dysphagia: Difficulty swallowing.
Genioplasty: Plastic surgery of the chin.
Malformation: An abnormal shape or structure.
Malocclusion: Imperfect contact with the mandibular and maxillary teeth.
Mandible: The horseshoe-shaped bone forming the lower jaw.
Mastication: Biting and grinding food in the mouth so it becomes soft enough to swallow.
Maxilla: A paired bone that forms the skeletal base of the upper face, roof of the mouth, sides of the nasal cavity and floor of the orbit (contains the eye); the upper jaw.
McNamara analysis: One of the most popular methods of cephalometric analyses. It combines the anterior reference plane with a description of the length of the individual’s jaw and the relationship between them.
Occlusion: Bringing the opposing surfaces of the teeth of the two jaws (mandible and maxilla) into contact with each other.
Orthodontics: The division of dentistry dealing with the prevention and correction of abnormally positioned or aligned teeth.
Panoramic radiograph: Radiograph of the maxilla and mandible extending from the left to right glenoid fossa. An x-ray image of a curved body surface, such as the upper and lower jaws, on a single film.
Radiograph: X-ray.
Skeletal discrepancies: An orthodontic term used to describe the nature of a malocclusion as being a malrelationship of the bony base rather than merely of the teeth; often assessed via cephalometrics.
Steiner analysis: One of the most commonly used cephalometric analysis methods. Utilizes the SNA angle to assess the anteroposterior position of the maxilla in regard to the cranial base. Steiner’s Analysis follows the belief that the most important measurements in his analysis were the ANB angle, which is formed by the difference between SNA and SNB angles.
Supraeruption: The occurrence of a tooth continuing to grow out of the gum if the opposing tooth in the opposite jaw is missing.
Tomogram: An image of a tissue section produced by tomography.
Tomography: Imaging by sections or sectioning, through the use of any kind of penetrating wave.
References |
Peer Reviewed Publications:
Government Agency, Medical Society, and Other Authoritative Publications:
Index |
Anteroposterior Discrepancies
Asymmetries
Cleft Palate
LeFort Procedure
Malocclusion: Class I, Class II, and Class III
Mandibular/Maxillary Surgery
Maxillofacial Surgery
Orthognathic Surgery
Transverse Discrepancies
Vertical Discrepancies
History |
Status | Date | Action |
Reviewed | 05/09/2024 | Medical Policy & Technology Assessment Committee (MPTAC) review. Updated Discussion and References sections. |
Revised | 05/11/2023 | MPTAC review. Revised hierarchy formatting of the Clinical Indications section. Updated Discussion and References sections. |
Reviewed | 05/12/2022 | MPTAC review. Updated References section. |
Revised | 05/13/2021 | MPTAC review. Removed term “physical” from the term “physical functional impairment” in the Clinical Indications section. Updated Discussion and References sections. Reformatted Coding section, added examples of diagnosis codes. |
| 04/07/2021 | Revised MN definition text in Description section. |
Reviewed | 05/14/2020 | MPTAC review. Updated References section. |
Reviewed | 06/06/2019 | MPTAC review. Updated References section. |
New | 07/26/2018 | MPTAC review. Initial document development. Moved content of SURG.00049 Mandibular/Maxillary (Orthognathic) Surgery to new clinical utilization management guideline document with the same title. |
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