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R579
R579 – Tenotomy - open - one toe
OHIP Radiology Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
When to Use
- Use R579 for a formal open surgical incision to divide a tendon on a single toe when percutaneous methods (Z229) are insufficient for the required release.
- Use R579 when performing an open tenotomy on one toe as a standalone procedure or as part of a larger foot surgery where the open approach is clinically indicated.
Common Pitfalls
- Billing R579 for multiple toes; you must use R581 if more than one toe is involved in the open procedure.
- Confusing R579 with percutaneous codes Z229 or Z243; ensure the operative report clearly describes an open incision, as closed procedures are rejected if billed as open.
- Assuming surgical assistant units are automatically payable; R579 does not have assigned assistant units and requires a manual claim with M400B and a letter of justification.
Billing Tips
- If an assistant is medically necessary for this procedure, you must submit the claim with M400B and provide a detailed letter explaining the specific clinical necessity to trigger independent consideration.
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