G453 – Electro-oculogram - interpretation fee
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Represents the professional component (interpretation) of an electro-oculogram (EOG). An EOG is a diagnostic test used in ophthalmology to measure the health of the retina, specifically the retinal pigment epithelium. This fee code covers the physician's work in analyzing the recorded electrical signals and providing a diagnostic report. The technical component of performing the test is billed separately or is part of a facility fee.
When to Use
- Use G453 when providing the formal professional interpretation of an electro-oculogram to assess retinal pigment epithelium function in patients with suspected Best disease or other vitelliform dystrophies.
- Bill G453 when reviewing EOG tracings for patients with unexplained visual loss where retinal toxicity from medications like hydroxychloroquine is suspected.
Common Pitfalls
- Do not bill G453 in conjunction with G454 (Electro-retinogram) for the same clinical encounter unless distinct, separate diagnostic indications are documented for both tests.
- Avoid billing G453 if the interpretation is performed by a technician or if the service is bundled into a global facility fee for hospital-based diagnostic clinics.
Billing Tips
- Ensure the diagnostic report is signed and dated in the patient record to substantiate the professional component claim during an audit.
- Attach the appropriate diagnostic code (ICD-9) corresponding to the retinal pathology being investigated to avoid rejection for lack of medical necessity.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Diagnostic
Diagnostic and Therapeutic Procedures
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