R737 – Aortic infundibular resection (ventriculomyotomy)
OHIP Radiology Code — CARDIOVASCULAR SURGICAL PROCEDURES · Schedule of Benefits
Aortic infundibular resection, also known as ventriculomyotomy, is a cardiovascular surgical procedure.
- Surgeon: The surgical fee (`R737A) is a flat rate.
- **Assistant**: The assistant fee (R737B`) is calculated based on 18 basic units plus time units as defined in -. Payment for a second assistant is also allowed without special authorization as per .
- Anaesthesia: The anaesthesia fee (`R737C`) is calculated based on 28 basic units plus time units as defined in -.
This procedure is eligible for various after-hours, age-based, and trauma premiums.
When to Use
- Use R737A for the surgical resection of the aortic infundibulum (ventriculomyotomy) in patients with hypertrophic obstructive cardiomyopathy.
- Use this code when performing the primary surgical intervention on the infundibular septum, distinct from broader procedures like R736 or R738.
Common Pitfalls
- Billing for a second assistant using a manual override or special authorization request, which is unnecessary as R737 is pre-approved for two assistants under GP90.
- Failing to document the Injury Severity Score (ISS) when attempting to claim the E420 trauma premium, which leads to automatic rejection of the 50% increase.
- Incorrectly adding basic units for multiple procedures when R737 is performed alongside other surgeries; remember that only the major procedure's basic units apply for both assistant and anaesthesia fees.
Billing Tips
- Ensure the anaesthesia start time is precisely recorded to maximize the time-unit component, as the 28 basic units are only the foundation of the R737C fee.
- Always verify that the E420 trauma premium is submitted on the same claim as the R737A surgical fee to ensure the 50% uplift is applied to the correct service.
Effective: April 1, 2026
Q. Cardiovascular Surgical Procedures
CARDIOVASCULAR SURGICAL PROCEDURES
Surgical
Cardiovascular Surgical Procedures
Assistant Basic Units: 18
Anaesthesia Basic Units: 28
A second assistant is payable without special authorization for this procedure.
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