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G431
G431 – Contact lens fitting - under general anaesthesia
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Contact lens fitting performed under general anaesthesia. This procedure is listed under the Ophthalmology subsection of Diagnostic and Therapeutic Procedures. The anaesthesia component for this service has 6 base units as per the Schedule of Benefits on page .
When to Use
- Use G431 when fitting a therapeutic or prosthetic contact lens for a pediatric or uncooperative patient who requires general anaesthesia to ensure proper placement.
- Use this code for post-surgical contact lens fitting in an operating room setting where the patient is already under general anaesthesia for a primary ocular procedure.
Common Pitfalls
- Billing G431 in conjunction with routine office-based contact lens fitting codes (e.g., G423 or G424) is a common error, as G431 is specific to the general anaesthesia environment.
- Failing to document the necessity of general anaesthesia for the fitting, which is a requirement for this specific code compared to standard office fitting procedures.
Billing Tips
- Ensure you append the appropriate after-hours premium (E409 or E410) if the procedure is performed on an emergency basis outside of standard daytime hours, as G431 is eligible for these premiums.
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