What is OHIP billing code N541?

N541 is "Removal of posterior instrumentation", an OHIP Otolaryngology code from the Ontario Schedule of Benefits (Physician Services).

How much does N541 pay?

The current OHIP fee for N541 is $255.00, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill N541 to OHIP?

N541 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates N541 claims against the Schedule of Benefits rules before submission.

What codes are related to N541?

Codes related to N541 in the Schedule of Benefits include N568.

All codes

N541

N541 – Removal of posterior instrumentation

OHIP Otolaryngology Code — SPINAL SURGICAL PROCEDURES · Schedule of Benefits

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A surgical procedure for the removal of posterior instrumentation. This is listed under the 'Revision Procedures for Spinal Surgical' section. The fee is for the surgeon's service (suffix 'A'). Assistant (suffix 'B') and Anaesthetist (suffix 'C') services are also payable and are calculated based on base units plus time units. See - for assistant and - for anaesthetist fee calculation rules.

When to Use

Use N541 when performing the removal of previously placed posterior spinal instrumentation, such as pedicle screws or rods, that is no longer required or is causing symptomatic hardware failure.
Select N541 for hardware removal procedures that are distinct from a primary spinal fusion or decompression, provided the instrumentation was originally placed posteriorly.

Common Pitfalls

Do not bill N541 in conjunction with N568 if the removal is considered an integral part of the revision fusion procedure, as this may trigger a claim rejection for unbundling.
Avoid billing N541 for the removal of anterior instrumentation, which requires different procedural coding; ensure the operative report clearly specifies the posterior approach to justify the code.

Billing Tips

Ensure the operative report explicitly details the extent of the hardware removed, as auditors look for evidence that the entire instrumentation set or specific segments were addressed to justify the full fee.
If the removal is performed on an emergency basis after hours, remember to append the appropriate surgical premium to the N541A claim to capture the full value of the procedure.

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Provider Fee$255.00

Surgical Assistant Fee$100.08

Anaesthetist Fee$123.92

Non-Anaesthetist Fee$123.92

Effective: April 1, 2025

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