G289 – Fick determination
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
G289 is a service for Fick determination, a type of cardiovascular diagnostic procedure. It is often performed in conjunction with other cardiac catheterization studies.
When to Use
- Use G289 when performing a Fick cardiac output calculation during a right heart catheterization to determine oxygen consumption and cardiac index.
- Bill G289 when calculating cardiac output via the Fick principle in conjunction with diagnostic cardiac catheterization codes like G285 or G286.
Common Pitfalls
- Submitting G289 alongside anaesthesia service codes for surgical procedures will result in an automatic rejection due to explicit billing restrictions.
- Billing G289 as a standalone procedure without the corresponding cardiac catheterization diagnostic codes often triggers audit flags for lack of clinical context.
Billing Tips
- Ensure the Fick determination is clearly identified as a distinct diagnostic step in the catheterization report to justify the additional fee on top of the primary procedure code.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Procedure
Diagnostic and Therapeutic Procedures
All insured services must be documented in appropriate records. The Act requires that the record establish that: an insured service was provided; the service for which the account is submitted is the service that was rendered; and the service was medically necessary.
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