R734 – Mitral annuloplasty
OHIP Radiology Code — CARDIOVASCULAR SURGICAL PROCEDURES · Schedule of Benefits
Mitral annuloplasty is a surgical procedure for repairing the annulus of the mitral valve. This procedure is listed in the Cardiovascular Surgical Procedures section of the Schedule of Benefits under the 'VALVES' sub-heading. The service has assigned basic units for both surgical assistance (R734B - 18 units) and anaesthesia (R734C - 20 units). As a surgical procedure, it is eligible for various premiums including those for after-hours service, age, and trauma, and may be performed with other valve procedures under the multivalvular replacement rule found on page .
When to Use
- Use R734 when performing a primary mitral annuloplasty repair, distinct from a full mitral valve replacement (R735) or commissurotomy (R733).
- Apply this code when the procedure is performed as part of a multivalvular surgery, ensuring the primary valve procedure is billed at 100% and R734 is billed at 85% if it is the secondary valve procedure.
Common Pitfalls
- Billing R734 in addition to a full valve replacement (R735) on the same valve, which is considered inclusive and will lead to a rejection for unbundling.
- Failing to correctly apply the 85% reduction rule when R734 is performed alongside another valve procedure, as the Schedule of Benefits mandates this adjustment for multivalvular cases.
Billing Tips
- Ensure the surgical assistant claims R734B and, if a second assistant is utilized, bill them separately as the Schedule of Benefits explicitly permits this without pre-authorization.
Effective: April 1, 2026
Q. Cardiovascular Surgical Procedures
CARDIOVASCULAR SURGICAL PROCEDURES
Surgical
Cardiovascular Surgical Procedures
Multivalvular replacement - the fee will be that for the major valve replaced plus 85% of the fee for the additional valve or valves.
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