Orthognathic Surgery
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Medical policy governing when orthognathic (jaw) surgery is considered medically necessary or not for Bluecross Idaho members; applies to coverage determinations and preauthorization for corrective jaw procedures for functional deficits and congenital deformities.
No material clinical or coverage changes in this revision.
Coverage Criteria
Medical necessity criteria
Covered when BOTH a qualifying facial skeletal deformity AND at least one functional deficit are present; also covered for specified congenital diagnoses or to restore function after acute trauma or tumor removal.
Overall requirement
- Facial skeletal deformities (any one qualifies): One or more of the following: anteroposterior discrepancies including maxillary/mandibular incisor relationship with horizontal overjet >= 5 mm or horizontal overjet 0 to negative value; or maxillary/mandibular anteroposterior molar relationship discrepancy >= 4 mm; vertical discrepancies including a vertical facial skeletal deformity >= 2 standard deviations from published norms; open bite with no vertical overlap of anterior teeth or unilateral/bilateral posterior open bite > 2 mm; deep overbite with impingement or irritation of buccal or lingual soft tissues; supraeruption of a dentoalveolar segment causing dysfunction not amenable to conventional prosthetics; transverse discrepancies including transverse skeletal discrepancy >= 2 standard deviations or total bilateral maxillary palatal cusp to mandibular fossa discrepancy >= 4 mm or unilateral discrepancy >= 3 mm given normal axial inclination of posterior teeth; or anteroposterior, transverse or lateral asymmetries > 3 mm with concomitant occlusal asymmetry.see policy thresholds (e.g., overjet >=5 mm; molar AP discrepancy >=4 mm; vertical/transverse >=2 SD; posterior open bite >2 mm; asymmetry >3 mm)
Numeric thresholds and measurement methods are specified in policy.
- Functional deficits (any one qualifies): One or more of the following: masticatory and swallowing dysfunction attributable to skeletal malocclusion (for example inability to incise or chew solid foods, choking on incompletely masticated food, or soft tissue injury from mastication) after other causes (neurologic, metabolic) have been ruled out by exam and/or appropriate testing; OR a speech abnormality that impairs communication and is determined by a speech pathologist/therapist to be related to skeletal malocclusion and not correctable by speech therapy (impairment or distortions of the sibilant sound class alone are NOT considered significant).
Other causes of the functional deficit must be excluded by appropriate evaluation.
Orthognathic surgery is specifically excluded from coverage when performed for the treatment of temporomandibular joint (TMJ) syndrome or temporomandibular disorders. The procedure is also not covered when undertaken solely for cosmetic reasons or to correct unaesthetic facial features, or when the service is a direct contract exclusion under the member’s plan.
Listing a procedure or diagnosis code in this policy is for reference only and does not guarantee member coverage or provider reimbursement. All coverage determinations are governed by the member-specific benefit plan documentation and other applicable terms, conditions, and legal requirements.
When the policy’s required criteria are not met — specifically, when the member does not have both a qualifying facial skeletal deformity and at least one qualifying functional deficit — orthognathic surgery is considered not medically necessary and may be denied.
Coding and Clinical Thresholds
| No codes listed |
| 21110 | Application of halo type appliance for maxillofacial fixation, includes removal (separate procedure). |
| 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, 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. |
| 21145 | Reconstruction midface, LeFort I; single piece, segment movement in any direction, requiring bone grafts (includes obtaining autografts). |
| 21146 | Reconstruction midface, LeFort I; two pieces, segment movement in any direction, requiring bone grafts (includes obtaining autografts). |
| 21147 | Reconstruction midface, LeFort I; three or more pieces, segment movement in any direction, requiring bone grafts (includes obtaining autografts). |
| 21150 | Reconstruction midface, LeFort II; anterior intrusion. |
| J98.9 | Respiratory disorder, unspecified. |
| M26.00 | Unspecified anomaly of jaw size. |
| M26.09 | Other specified anomalies of jaw size. |
| M26.10 | Unspecified anomaly of jaw-cranial base relationship. |
| M26.19 | Other specified anomalies of jaw-cranial base relationship. |
| M26.20 | Unspecified anomaly of dental arch relationship. |
| M26.29 | Other anomalies of dental arch relationship. |
| M26.219 | Malocclusion, unspecified. |
| M26.4 | Malocclusion, unspecified. |
| M26.59 | Other dentofacial functional abnormalities. |
Provider Actions and Prior Authorization
Prior authorization — verify per member plan
Check the member’s eligibility and the member-specific benefit plan before requesting authorization or applying this policy; identify the member-specific benefit plan and any related policies or guidelines prior to applying this medical policy.
- Verify member eligibility and benefit plan terms.
- Document any line-of-business exceptions (e.g., Federal Employee Program, Medicare Advantage) when applicable.
Prior authorization may apply — codes provided for reference
Prior authorization may be required per the member-specific benefit plan; the policy provides CPT codes for reference that may be subject to authorization rules in the plan.
Step therapy — Not applicable
This policy does not specify any step-therapy requirements for orthognathic surgery.
Provider must identify member eligibility and plan details
Follow the policy instruction to identify member eligibility and the member-specific benefit plan; this medical policy is informational and not an authorization or contract.
- The policy states it does not constitute medical advice or an authorization; receipt of benefits depends on member-specific plan terms.
Benefit verification and documentation — verify eligibility and plan
Verify member eligibility and reference the member-specific benefit plan; document benefit application and any applicable line-of-business exceptions when applying this policy.
- Identify the member-specific benefit plan and any related policies or guidelines prior to applying this medical policy.
- Document line-of-business exceptions (e.g., Federal Employee Program, Medicare Advantage) if relevant.
Documentation and benefit plan requirement — follow member-specific plan
When requesting coverage, follow the member-specific benefit plan documentation and other applicable policies and guidelines; coding guidance in this policy is provided for reference only.
- Adhere to the member-specific benefit plan terms and other applicable policies.
- Use the coding guidance in the policy only as reference; it does not replace plan documentation.
Denial risk when criteria unmet — not medically necessary if criteria not met
Claims for orthognathic surgery that do not meet the policy’s criteria for facial skeletal deformity AND functional deficits are considered not medically necessary and may be denied.
- Ensure documentation demonstrates both qualifying skeletal deformity and at least one qualifying functional deficit per policy thresholds to avoid denial.
Coverage not guaranteed by code listing — inclusion does not ensure payment
The inclusion of a CPT or ICD code in this policy is for reference only and does not guarantee member coverage or provider reimbursement; coverage determinations remain subject to the member-specific benefit plan and other terms and conditions.
- Do not assume coverage or payment solely because a code appears in the policy; verify member plan provisions.
Background
Orthognathic surgery refers to surgical procedures that reposition the maxilla, mandible, and dentoalveolar segments to correct malocclusion and facial skeletal deformities. These operations commonly involve osteotomies with fixation (plates, screws, or wires), may include bone grafts or distraction osteogenesis, and are typically performed under general anesthesia; they are intended to restore function (for example, chewing, swallowing, or speech) and to correct significant skeletal abnormalities rather than for routine cosmetic alteration.
Definitions
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