G439 – Full field electro-retinography - professional component
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
This service is the professional component for a full-field electro-retinography, which includes the physician's interpretation and a written report. It is billed in conjunction with the technical component, G852. As per , payment for electro-retinography services includes any pupil dilation and refraction necessary to complete the study.
When to Use
- Use G439 when providing the professional interpretation and written report for a full-field electro-retinography study performed in conjunction with the technical component G852.
- Bill this code when evaluating retinal function in patients with suspected hereditary retinal dystrophies or unexplained vision loss where objective electrophysiological assessment is required.
Common Pitfalls
- Billing G439 without the corresponding technical component G852 on the same day will result in a rejection or audit flag for an incomplete service.
- Attempting to bill for pupil dilation or refraction separately is a violation of the J90 schedule, as these are considered bundled into the G439 fee.
- Exceeding the limit of two services per 12-month period per patient will trigger an automatic rejection from the Ministry.
Billing Tips
- Ensure the written report is finalized and dated on the same day as the G852 technical component to maintain billing consistency and compliance with J90 requirements.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Diagnostic
Diagnostic and Therapeutic Procedures
A written report of the electro-retinography is required.
As per , all insured services must be documented in the patient's medical record to establish that: 1. an insured service was provided; 2. the service for which the account is submitted is the service that was rendered; and 3. the service was medically necessary.
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