What is OHIP billing code G450?

G450 is "Sound field audiometry (infants and children) - professional component", an OHIP Diagnostic & Therapeutic Procedures code from the Ontario Schedule of Benefits (Physician Services).

How much does G450 pay?

The current OHIP fee for G450 is $5.70, effective 2025-04-01, per the Ontario Schedule of Benefits.

How do I bill G450 to OHIP?

G450 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates G450 claims against the Schedule of Benefits rules before submission.

What codes are related to G450?

Codes related to G450 in the Schedule of Benefits include G448.

All codes

G450

G450 – Sound field audiometry (infants and children) - professional component

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

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This represents the professional component for sound field audiometry, an advanced diagnostic hearing test for infants and children. The amount payable is reduced to nil if any claim is submitted for G525, G441 or G526 rendered to the patient on the same day.

When to Use

Use G450 when performing professional interpretation of sound field audiometry for pediatric patients to assess hearing thresholds in a sound-treated environment.
Select G450 specifically for infants and children up to age 15 when diagnostic testing is required to rule out hearing loss following a physician or nurse practitioner referral.

Common Pitfalls

Billing G450 on the same day as G525, G441, or G526 will result in a zero-dollar payment due to the mandatory payment adjustment rules.
Submitting G450 without a valid referral from a physician, nurse practitioner, or oral maxillofacial surgeon will lead to claim rejection based on the GP111 requirements.

Billing Tips

Verify that no other diagnostic audiology codes from the G525, G441, or G526 group are being claimed for the same encounter to ensure the professional fee for G450 is paid.

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Provider Fee$5.70

Effective: April 1, 2025

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