G350 – Esophageal motility study with manometry and/or impedance planimetry
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Performs one or more oesophageal motility studies using manometry to measure the function and coordination of the oesophageal muscles. This procedure is typically used to diagnose conditions causing difficulty swallowing, chest pain, or heartburn. This service includes all common elements of an insured service as defined in the Schedule of Benefits (, ).
When to Use
- Use G350 when performing high-resolution manometry to evaluate patients with suspected achalasia or distal esophageal spasm.
- Use G350 for patients presenting with non-cardiac chest pain or dysphagia where impedance planimetry is required to assess bolus transit or esophageal distensibility.
Common Pitfalls
- Do not bill G350 in conjunction with G351 or G353 on the same day, as these codes are considered mutually exclusive for the same diagnostic session.
- Claims will be rejected if billed with E409 or E410, as G350 is not recognized as a major invasive procedure eligible for after-hours procedure premiums.
- Failure to verify the referral source when billing for services rendered in an ICHSC or hospital can lead to automatic rejection if the referring provider is a Nurse Practitioner.
Billing Tips
- Ensure the referral is clearly documented in the patient record, as G350 strictly requires a referral from a physician, nurse practitioner, or oral maxillofacial surgeon to be considered an insured service.
Effective: April 1, 2026
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Procedure
Diagnostic and Therapeutic Procedures
All insured services must be documented in appropriate records that establish: 1. an insured service was provided; 2. the service for which the account is submitted is the service that was rendered; and 3. the service was medically necessary.
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