R520 – Mandibular osteotomies for retrognathia, any technique - advancement - up to 10 mm
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Mandibular osteotomy for retrognathia, any technique, with an advancement up to 10 mm. This service is a surgical procedure listed under orthognathic surgery. Payment is eligible for the surgeon (suffix A), surgical assistant (suffix B), and anaesthesiologist (suffix C). Fees for the assistant and anaesthesiologist are calculated based on a combination of base units and time units as outlined in the Schedule of Benefits (, ).
When to Use
- Use R520 specifically for mandibular advancement procedures up to 10 mm to correct retrognathia.
- Use R520 in conjunction with E588 if the surgical plan explicitly includes the correction of apertognathia or laterognathia.
Common Pitfalls
- Billing R520 for mandibular movements exceeding 10 mm, which requires a different code or manual review.
- Attempting to bill for a second surgical assistant without prior authorization, as R520 is not on the pre-approved list for multiple assistants.
- Failing to document the Injury Severity Score (ISS) in the medical record when attempting to claim the E420 trauma premium.
Billing Tips
- Ensure the E588 add-on code is submitted on the same claim as R520 to avoid rejection when correcting apertognathia or laterognathia.
- Verify that the surgical assistant and anaesthesiologist units are calculated correctly based on the Schedule of Benefits, as these are separate from the surgeon's flat fee.
Effective: April 1, 2025
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
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