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G357
G357 – Gastric secretion studies
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
G357 is for the procedure and supervision of gastric secretion studies, including those using Augmented Histamine, Histalog, or Pentagastrin. This is a separately listed procedure and is eligible for payment in conjunction with an appropriate assessment or other primary service. It is not eligible for payment as a stand-alone procedure and must be rendered in conjunction with an appropriate assessment or other primary service.
When to Use
- Use G357 when performing gastric acid analysis using stimulants like Pentagastrin to evaluate suspected Zollinger-Ellison syndrome or refractory peptic ulcer disease.
- Bill G357 alongside a consultation or assessment code when the procedure is the primary diagnostic focus of the patient encounter.
Common Pitfalls
- Submitting G357 as a stand-alone claim will trigger an automatic rejection because it requires an associated assessment or primary service code.
- Failing to link the procedure to a specific diagnostic code that justifies the necessity of a gastric secretion study will lead to audit scrutiny.
Billing Tips
- Always pair G357 with an appropriate E-code or A-code assessment to ensure the claim meets the 'not a stand-alone procedure' requirement.
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