Z439 – Right heart catheterization - pressures only
OHIP Psychiatric Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
When to Use
- Use Z439 when performing a right heart catheterization specifically for hemodynamic pressure monitoring without the need for coronary angiography or complex interventions.
- Select Z439 for diagnostic pressure assessment in patients where imaging and contrast injection are performed as part of the standard catheterization process.
Common Pitfalls
- Do not bill Z439 in addition to other cardiac catheterization codes (G285, G286, G288) at full value; subsequent procedures performed in the same sitting must be reduced to 50% of the fee.
- Failure to document the specific hemodynamic pressure measurements in the procedure note can lead to audit recovery, as the code specifically covers the interpretation of these pressures.
Billing Tips
- If performing multiple cardiac catheterization procedures in one session, always list the highest-valued procedure first to maximize the 50% reduction rule on the secondary codes.
- Ensure that any required trauma premiums (E420A) or age-based premiums are applied to the total procedural fee, but remember that the 50% reduction for multiple procedures applies to the base fee before these premiums.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Surgical
Diagnostic and Therapeutic Procedures
For anaesthesia or assistant services, the start and stop times must be recorded in the patient's medical record as per time-based service rules (:).
If the trauma premium E420A is claimed, the Injury Severity Score (ISS) must be listed in the medical record (:).
If claiming anaesthesia extra units (e.g., E010C for BMI > 40), the relevant condition must be documented (:).
Note: 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.
Note: 2. When more than one procedure is carried out at one sitting, the additional procedures are payable at 50% of the listed benefits. (Z439 to G288, excluding G262 and G263).
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