All codes
G251
G251 – Oesophageal pH study for reflux, with installation of acid
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
An oesophageal pH study for reflux, with the installation of acid.
When to Use
- Use G251 when performing a formal acid perfusion test (Bernstein test) to reproduce symptoms of gastroesophageal reflux.
- Select this code specifically for diagnostic procedures involving the direct instillation of acid into the esophagus to assess sensitivity, rather than standard ambulatory 24-hour pH monitoring.
Common Pitfalls
- Billing G251 in conjunction with G350 or G353 for the same session is often flagged as unbundling if the procedures are considered part of the same diagnostic workup.
- Attempting to claim after-hours premiums like E409 or E410 will result in automatic rejection as G251 is not classified as a major invasive procedure.
Billing Tips
- Ensure the diagnostic report explicitly details the instillation process and the patient's symptomatic response to satisfy the mandatory documentation requirement for this specific procedure.
Provider Fee$27.05
Specialist Fee$0.00
Surgical Assistant Fee$0.00
Anaesthetist Fee$0.00
Non-Anaesthetist Fee$0.00
Effective: April 1, 2025
Category
J. Diagnostic and Therapeutic Procedures
Subcategory
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Service Type
Diagnostic
Code Classes
Diagnostic and Therapeutic Procedures
Referral RequiredFrom: Physician, NursePractitioner
A written report with findings and interpretation must be included in the patient's medical record.
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