R480 – Mandibular osteotomies for prognathism - subcondylar
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
R480 is an orthognathic surgical procedure for a subcondylar mandibular osteotomy to correct prognathism. The fee for this service includes the surgeon's work (suffix A). Payment for an assistant (suffix B) and anaesthetist (suffix C) are calculated separately based on base units and time units. The anaesthesia base unit value is 7 and the assistant base unit value is 6. For detailed calculation of time units, refer to for assistants and for anaesthesia. This code is found on page of the Schedule under Musculoskeletal System Surgical Procedures.
When to Use
- Use R480 specifically for subcondylar mandibular osteotomies performed to correct mandibular prognathism.
- Select R480 when the surgical approach is limited to the subcondylar region, distinguishing it from more extensive procedures like R529 (sagittal split osteotomy) or R535 (mandibular osteotomy, other).
Common Pitfalls
- Billing R480 alongside other mandibular osteotomy codes (e.g., R529 or R535) for the same procedure is a common cause of rejection due to duplicate billing for the same anatomical site.
- Failure to document the specific subcondylar technique can lead to audit scrutiny if the procedure performed is actually a more complex bilateral sagittal split osteotomy, which carries a different fee structure.
Billing Tips
- Ensure the anaesthesia and assistant units are calculated using the base units of 7 and 6 respectively, and verify that time units are applied according to the specific GP sections referenced in the Schedule.
Effective: April 1, 2025
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
This procedure is listed under the heading 'Mandibular osteotomies for prognathism'.
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.