What is OHIP billing code G203?

G203 is "Ophthalmic test - direct", an OHIP Diagnostic & Therapeutic Procedures code from the Ontario Schedule of Benefits (Physician Services).

How much does G203 pay?

The current OHIP fee for G203 is $1.60, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill G203 to OHIP?

G203 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates G203 claims against the Schedule of Benefits rules before submission.

All codes

G203

G203 – Ophthalmic test - direct

OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits

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A direct ophthalmic test for allergies. This service is limited to a maximum of 3 per year per test as per the listing on .

When to Use

Use G203 when performing a direct ophthalmic allergy test, such as a conjunctival provocation test, to confirm hypersensitivity to specific allergens.
Select G203 for diagnostic confirmation of allergic conjunctivitis when clinical history alone is insufficient to identify the offending agent.

Common Pitfalls

Billing G203 on the same day as any counselling code (e.g., K013, K033) will trigger an automatic rejection because G203 is not an exempted procedure.
Exceeding the annual limit of 3 services per patient per year will result in automatic claim denials for subsequent submissions.

Billing Tips

Ensure the diagnostic code linked to G203 specifically reflects an allergic condition (e.g., ICD-9 372.0) to avoid audit scrutiny regarding medical necessity.

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Provider Fee$1.60

Effective: April 1, 2025

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