What is OHIP billing code E492?

E492 is "Synovectomy - for diseased synovium", an OHIP Surgical Assists code from the Ontario Schedule of Benefits (Physician Services).

How much does E492 pay?

The current OHIP fee for E492 is $231.30, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill E492 to OHIP?

E492 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates E492 claims against the Schedule of Benefits rules before submission.

What codes are related to E492?

Codes related to E492 in the Schedule of Benefits include E494, E498.

All codes

E492

E492 – Synovectomy - for diseased synovium

OHIP Surgical Assists Code — MUSCULOSKELETAL SYSTEM SURGICAL PROCEDURES · Schedule of Benefits

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A surgical procedure for synovectomy of the knee for diseased synovium. The procedure can be anterior, posterior, or complete. In accordance with payment rules on page , E492 is not eligible for payment in addition to E494 (Debridement - degenerative cartilage) or E498 (Debridement - trauma).

When to Use

Use E492 for the surgical removal of diseased synovium in the knee, such as in cases of chronic inflammatory synovitis or rheumatoid arthritis.
Select E492 when the primary clinical objective is the synovectomy itself, rather than the incidental debridement of cartilage.

Common Pitfalls

Billing E492 in combination with E494 or E498 will result in a rejection, as these codes are mutually exclusive for the same knee procedure.
Attempting to claim E492 alongside debridement codes for the same operative session is a common audit trigger for unbundling.

Billing Tips

If an assistant is required for the procedure, you must submit the claim using M400B and provide a letter of justification to a medical consultant for authorization.
Ensure the operative report clearly distinguishes the synovectomy from any concurrent cartilage work to justify the selection of E492 over restricted debridement codes.

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Provider Fee$231.30

Effective: April 1, 2025

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