R964 – Double level correction - circular external fixation
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Double level correction - circular external fixation is a reconstructive surgical procedure performed on the femur to correct deformities. This service is listed under the Musculoskeletal System section of the Schedule of Benefits. Assistant and Anaesthesia services are unit-based, with base units of 6 for each. See - for assistant rules and - for anaesthesia rules.
When to Use
- Use R964 specifically for femoral deformity correction requiring circular external fixation at two distinct levels of the bone.
- Distinguish from R963, which is limited to single-level correction, to ensure accurate fee capture for the increased complexity of double-level procedures.
Common Pitfalls
- Billing R964 for single-level corrections, which will be flagged as an over-billing error during audit if the operative report does not clearly delineate two separate levels of osteotomy or correction.
- Failing to document the specific Injury Severity Score (ISS) when attempting to claim the E420 trauma premium, as R964 is a major surgical procedure where trauma eligibility is frequently audited.
Billing Tips
- Ensure the operative report explicitly details the circular external fixation application at two levels to support the R964 fee, as this is the primary documentation requirement for this specific code.
Effective: April 1, 2025
N. Musculoskeletal System Surgical Procedures
MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
Anaesthesia basic units: 6.
Assistant basic units: 6.
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.