Z441 – Transeptal left heart catheterization
OHIP Psychiatric Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Z441 is for a left heart cardiac catheterization performed via a transeptal approach. Note, as per page : 1. Cardiac catheterization procedures (Z439 to G288) include insertion of catheter (including cutdown and repair of vessels if rendered), catheter placement, contrast injection, imaging and interpretation. 2. When more than one procedure is carried out at one sitting, the additional procedures are payable at 50% of the listed benefits (this applies to Z439 to G288, excluding G262 and G263).
When to Use
- Use Z441 specifically when the clinical requirement necessitates access to the left atrium via a transseptal puncture, such as for mitral valvuloplasty or left-sided electrophysiology mapping.
- Select Z441 over Z439 (standard left heart catheterization) when the procedure involves crossing the interatrial septum, as Z439 is intended for retrograde arterial access.
Common Pitfalls
- Billing Z441 in conjunction with other cardiac catheterization codes without applying the 50% reduction rule for multiple procedures, which will trigger an automatic adjustment or rejection.
- Attempting to bill for vessel cutdown or repair separately; these services are considered inclusive of the Z441 fee as per the Schedule of Benefits.
- Failure to provide the required letter of justification when billing for a surgical assistant (M400B), which is mandatory for this procedure.
Billing Tips
- Ensure that when multiple cardiac catheterization procedures are performed in the same session, the highest-valued code is billed at 100% and subsequent eligible procedures are billed at 50% to avoid claim processing errors.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Surgical
Diagnostic and Therapeutic Procedures, Surgical Assistants' Services, Anaesthesiologists' Services
Cardiac catheterization procedures include insertion of catheter (including cutdown and repair of vessels if rendered), catheter placement, contrast injection, imaging and interpretation.
Assistant at this procedure is payable based on 7 basic units ('Anae' value) plus time units, but requires authorization by a medical consultant. A letter from the surgeon outlining the reason the assistant was required must be submitted with the claim, using fee code M400B.
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