Orthognathic Surgery
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Medical necessity criteria and coding guidance for orthognathic (jaw) surgery for members/enrollees covered by the health plan; governs when procedures are considered medically necessary versus non‑medical/cosmetic.
Updated numeric thresholds in criteria I.A.1.a and I.A.1.b to use ≥ (e.g., overjet ≥5 mm and molar discrepancy ≥4 mm) and clarified soft tissue impingement language in I.A.2.c.
Added and removed multiple CPT codes in the coding list (several CPTs such as 21120–21123 and 21159–21160 added; 21248 and 21249 removed at one point).
Specified airway/OSA criterion requires documented polysomnogram and failure/intolerance of PAP and failure or ineligibility for less invasive surgery.
Coverage Criteria
inv-01: Medically necessary orthognathic surgery
Covered when ALL of the following are met:
I.B Functional impairment
- Mastication/swallowing dysfunction: Persistent difficulties with mastication and swallowing after causes such as neurological or metabolic diseases have been excluded
- Nutritional compromise: Malnutrition, significant weight loss, or failure-to-thrive secondary to facial skeletal deformity
- Speech dysfunction directly related to jaw deformity as determined by a speech and language pathologist
Requires SLP determination
- Myofascial pain secondary to facial skeletal deformity persisting ≥ 6 months despite compliant conservative treatment (e.g., physical therapy, splints)>=6 months
Conservative therapy must be documented
- Airway obstruction/OSA: Obstructive sleep apnea documented by polysomnogram AND intolerant to or failed PAP AND has failed or is not a candidate for less invasive surgical proceduresPSG documented OSA; PAP failure/intolerance; failed/INA for less invasive surgery
All sub-conditions required for OSA indication
inv-02: Not medically necessary / Exclusions
Orthognathic procedures performed solely to improve appearance are excluded from coverage as cosmetic interventions. The policy explicitly states that surgeries whose only intent is aesthetic correction—regardless of associated psychological symptoms—are considered non‑covered.
Orthognathic surgery is also considered not medically necessary when the member is still undergoing craniofacial growth and the jaw deformity could be corrected with less intrusive, non‑surgical treatments (for example, use of an expander or head gear). In such cases, definitive surgical correction should be deferred until growth is complete or surgical indications are otherwise met.
Coding and Objective Thresholds
| 21110 | Application of interdental fixation device for conditions other than fracture or dislocation, includes removal. |
| 21120 | Genioplasty; augmentation (autograft, allograft, prosthetic material). |
| 21121 | Genioplasty; sliding osteotomy, single piece. |
| 21122 | Genioplasty; sliding osteotomies, 2 or more osteotomies (eg, wedge excision or bone wedge reversal for asymmetrical chin). |
| 21123 | Genioplasty; sliding, augmentation with interpositional bone grafts (includes obtaining autografts). |
| 21125 | Augmentation, mandibular body or angle; prosthetic material. |
| 21127 | Augmentation, mandibular body or angle; with bone graft, onlay or interpositional (includes obtaining autograft). |
| 21141 | Reconstruction midface, LeFort I; single piece, segment movement in any direction (eg, for Long Face Syndrome), without bone graft. |
| 21142 | Reconstruction midface, LeFort I; two pieces, segment movement in any direction, without bone graft. |
| 21143 | Reconstruction midface, LeFort I; three or more pieces, segment movement in any direction, without bone graft. |
Provider Actions and Requirements
Prior authorization required for listed orthognathic CPT codes
Prior authorization is required for the listed orthognathic CPT procedures; submit clinical documentation demonstrating that the policy medical necessity criteria are met.
Step requirements for OSA-related orthognathic surgery
For requests where the indication is obstructive sleep apnea (OSA), the policy requires documentation that the member was intolerant of or failed a trial of positive airway pressure (PAP) and has failed or is not a candidate for less invasive surgical procedures before orthognathic surgery will be considered.
- Must have polysomnogram–documented OSA and show PAP intolerance or failure.
- Must demonstrate failure of, or ineligibility for, less invasive surgical options prior to approval.
Required clinical documentation and objective measurement thresholds
Provide objective skeletal measurements that meet the policy thresholds and documentation of at least one qualifying functional impairment to support medical necessity.
- Anteroposterior: maxillary/mandibular incisor overjet ≥5 mm (or zero to negative) or molar AP discrepancy ≥4 mm.
- Vertical: ≥2 standard deviations from norms for facial skeletal landmarks, or open bite with no anterior overlap or posterior open bite >2 mm, or deep overbite with soft tissue impingement, or supraeruption when dentition intact.
- Transverse: transverse skeletal discrepancy ≥2 standard deviations from norms or bilateral palatal cusp to mandibular fossa discrepancy ≥4 mm (or unilateral ≥3 mm).
- Asymmetry: AP, transverse, or lateral asymmetries >3 mm with concomitant occlusal asymmetry.
- Functional impairment documentation options include mastication/swallowing dysfunction (after exclusion of other causes), malnutrition/weight loss, speech dysfunction per a speech and language pathologist, myofascial pain ≥6 months despite conservative therapy, or PSG‑documented OSA with required PAP/step documentation.
Denial risks for missing objective criteria or cosmetic intent
Requests may be denied if objective measurement criteria or required documentation of functional impairment/OSA step requirements are not provided, or if the procedure is solely for cosmetic improvement of appearance.
- Lack of documentation that measurements meet thresholds (e.g., overjet ≥5 mm, molar ≥4 mm, vertical/transverse thresholds) risks denial as not medically necessary.
- Requests where the sole purpose is to improve appearance are considered cosmetic and are not covered.
- Performing surgery while the enrollee is still developing when less intrusive corrective options exist may lead to denial.
Background
Orthognathic surgery addresses abnormalities of the mandible and/or maxilla that result in functional impairment. Typical functional indications include difficulties with mastication or swallowing, speech dysfunction, myofascial pain refractory to conservative care, nutritional compromise, and airway obstruction such as obstructive sleep apnea. When these functional problems are documented and meet the policy’s objective criteria, surgery aims to restore occlusion and improve function rather than to change appearance alone.
Definitions
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