R478 – Repair fascial defects - large
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
This service is for the surgical repair of a large fascial defect located in the elbow or forearm. The procedure is specified as being 'large' and may include the use of a synthetic graft or the creation of a rotation flap to cover the defect. This is a surgical procedure eligible for surgeon (suffix A), assistant (suffix B), and anaesthetist (C) fees, with specific base units assigned for assistant and anaesthesia services.
When to Use
- Use R478 for the surgical repair of a large fascial defect in the elbow or forearm that requires a synthetic graft for closure.
- Use R478 when a rotation flap is specifically created to address a large fascial defect in the forearm or elbow region.
- Use R478 instead of R476 when the defect size necessitates more extensive reconstruction beyond simple primary closure.
Common Pitfalls
- Billing R478 for minor fascial repairs that do not involve synthetic grafts or rotation flaps, which should be billed under lower-value codes.
- Failing to document the specific dimensions or the complexity of the defect, which is required to justify the 'large' classification during an audit.
- Attempting to bill a second assistant without prior medical consultant authorization, as R478 is not on the pre-approved list for multiple assistants.
Billing Tips
- Ensure the operative report explicitly details the use of synthetic materials or the creation of a rotation flap to support the 'large' classification of the defect.
- When performing multiple procedures during the same session, ensure the base units for the assistant and anaesthetist are correctly derived from the major procedure code as per GP85 and GP93.
Effective: April 1, 2025
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
For time-based services (assistant and anaesthesia), the start and end times must be recorded in the patient's permanent medical record ().
Base units for assistant (Asst): 6
Base units for anaesthesia (Anae): 7
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