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G851
G851 – Dark adaptation curve - technical component
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
This service covers the technical component of a dark adaptation curve test using a Goldmann adaptometer or an equivalent device. It is a diagnostic procedure in ophthalmology. The professional component, which includes the interpretation and report, is claimed separately under G437.
When to Use
- Use G851 when performing the technical data acquisition for a dark adaptation curve in an office setting to assess retinal function in patients with suspected age-related macular degeneration or night blindness.
- Claim G851 in conjunction with G437 when you have personally overseen the technical setup and data collection for the test, ensuring the professional interpretation is billed separately.
Common Pitfalls
- Billing G851 for an inpatient service without applying the mandatory 13.9% reduction to the fee, which will trigger an automatic rejection or audit adjustment.
- Attempting to claim G851 when the diagnostic test is performed within 24 hours of an inpatient admission for the same condition, as this is considered part of the hospital global funding.
- Failing to maintain a documented quality assurance process for the equipment and data acquisition, which is a mandatory requirement for the technical component claim.
Billing Tips
- Always pair G851 with G437 on the same day of service to ensure both the technical and professional components are captured, provided the interpretation is documented separately.
Provider Fee$35.50
Effective: April 1, 2026
Category
J. Diagnostic and Therapeutic Procedures
Subcategory
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Service Type
Diagnostic
Code Classes
Diagnostic and Therapeutic Procedures
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