What is OHIP billing code Z597?

Z597 is "Intracavitary/intratumoural injections", an OHIP Psychiatric code from the Ontario Schedule of Benefits (Physician Services).

How much does Z597 pay?

The current OHIP fee for Z597 is $159.05, effective 2026-04-01, per the Ontario Schedule of Benefits.

How do I bill Z597 to OHIP?

Z597 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates Z597 claims against the Schedule of Benefits rules before submission.

What codes are related to Z597?

Codes related to Z597 in the Schedule of Benefits include J010, J037, J011, J038, J020, J012, J060, J045.

All codes

Z597

Z597 – Intracavitary/intratumoural injections

OHIP Psychiatric Code — CLINICAL PROCEDURES ASSOCIATED WITH DIAGNOSTIC RADIOLOGICAL EXAMINATIONS · Schedule of Benefits

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Intracavitary/intratumoural injections. This service is a clinical procedure listed under the miscellaneous procedures of the 'Clinical Procedures Associated with Diagnostic Radiological Examinations' section. The service is eligible for anaesthesia with 7 base units.

When to Use

Use Z597 for the direct injection of therapeutic agents into a tumor or a body cavity under radiological guidance when no other specific procedural code exists for the site-specific injection.
Use Z597 for intratumoural chemotherapy or sclerotherapy injections that are performed in conjunction with diagnostic radiological imaging, provided the service is not bundled into a global surgical fee.

Common Pitfalls

Do not bill Z597 in addition to a primary surgical procedure code for the same site, as the injection is typically considered an integral part of the primary procedure.
Avoid using Z597 for simple aspiration procedures; it is strictly for the injection component of the clinical procedure.
Failure to document the specific radiological guidance used can lead to audit rejections, as this code is categorized under 'Clinical Procedures Associated with Diagnostic Radiological Examinations'.

Billing Tips

Ensure the claim includes the relevant diagnostic imaging code if the injection is part of a larger radiological assessment, as Z597 is intended to be associated with these services.
If an assistant is required, you must submit a letter to the Ministry outlining the medical necessity to trigger the M400B authorization process, as there is no automatic assistant unit assigned.

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Provider Fee$159.05

Anaesthetist Fee$111.72

Non-Anaesthetist Fee$111.72

Effective: April 1, 2026

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