R507 – Total U dento-alveolar osteotomy - maxilla
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Total U dento-alveolar osteotomy of the maxilla. This is a surgical procedure listed under orthognathic surgery for the skull and mandible. This service is eligible for surgeon (A), assistant (B), and anaesthetist (C) fees. The anaesthetist fee is based on 15 basic units plus time units. The assistant fee is based on 6 basic units plus time units.
When to Use
- Use R507 for a total maxillary dento-alveolar osteotomy (Le Fort I osteotomy) performed to correct dentofacial deformities.
- Select R507 when the procedure involves the complete mobilization of the maxilla to reposition the dento-alveolar segment, distinguishing it from segmental procedures like R502.
Common Pitfalls
- Billing R507 in conjunction with other maxillary osteotomy codes (e.g., R502) without clear documentation of distinct, separate surgical sites or procedures, which may trigger a rejection for unbundling.
- Failing to document the Injury Severity Score (ISS) when attempting to claim the Trauma Premium (E420) for emergency cases, leading to automatic premium rejection.
Billing Tips
- Ensure the claim includes the correct suffix (A for surgeon, B for assistant, C for anaesthetist) to prevent processing delays.
- When billing for pediatric patients, verify the patient's exact age in days or years to automatically apply the correct Age Premium (e.g., AGE_PREMIUM_LT1Y) as these are not always applied by default.
Effective: April 1, 2025
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
If claiming the Trauma Premium (E420), the medical record must list the Injury Severity Score (ISS).
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