What is OHIP billing code G494?

G494 is "Glucagon test - (Type A) for carbohydrate response", an OHIP Diagnostic & Therapeutic Procedures code from the Ontario Schedule of Benefits (Physician Services).

How much does G494 pay?

The current OHIP fee for G494 is $10.20, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill G494 to OHIP?

G494 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates G494 claims against the Schedule of Benefits rules before submission.

All codes

G494

G494 – Glucagon test - (Type A) for carbohydrate response

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

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Glucagon test (Type A) for carbohydrate response. This test is used to evaluate the body's reaction to glucagon, specifically in relation to carbohydrate metabolism.

When to Use

Use G494 when performing a formal glucagon stimulation test to assess pancreatic beta-cell reserve or glycogen storage capacity.
Bill this code when the clinical objective is to measure the glycemic response to exogenous glucagon, distinct from routine blood glucose monitoring.

Common Pitfalls

Billing G494 alongside a K-code for counselling or psychotherapy will result in an automatic rejection, as these services are mutually exclusive.
Attempting to bill G494 as part of a general physical examination is a common audit trigger; ensure the procedure is documented as a distinct diagnostic intervention.

Billing Tips

Since G494 is a separately listed procedure, you may claim it in addition to an assessment code if the clinical encounter warrants both, provided they are not restricted by the same-day counselling rule.

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Provider Fee$10.20

Effective: April 1, 2025

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