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Z624
Z624 – Dilatation of tract
OHIP Psychiatric Code — UROGENITAL AND URINARY SURGICAL PROCEDURES · Schedule of Benefits
Z624 is a surgical procedure for the dilatation of a tract, listed under percutaneous procedures for the kidney and upper urinary tract. As a surgical procedure, payment requires the use of suffix 'A' for the surgeon. The fee for this service includes all common elements of insured services as described on -. Anaesthesia services are payable with suffix 'C' but basic units are not specified and must be determined by comparison to a comparable procedure as per .
When to Use
- Use Z624 when performing a percutaneous dilatation of an existing nephrostomy tract to facilitate subsequent endourological procedures.
- Use Z624 as the primary procedure code when the clinical focus is the mechanical expansion of the tract, distinct from the initial placement of a nephrostomy tube (Z623).
Common Pitfalls
- Billing Z624 in addition to a definitive endourological procedure on the same tract is often considered inclusive; ensure the dilatation is a distinct, necessary step if billing separately.
- Failure to append suffix 'A' for the surgeon will result in automatic rejection, as this is strictly defined as a surgical procedure.
- Incorrectly assuming anaesthesia units are fixed; because Z624 does not have specified basic units, you must manually determine and justify them by comparison to similar urological procedures per GP93.
Billing Tips
- Always verify if the dilatation is incidental to a more comprehensive procedure (e.g., stone extraction), as OHIP may bundle the dilatation into the primary surgical fee.
- When billing for paediatric patients, ensure the correct age-based premium is applied to the $105.25 base fee to maximize the claim value.
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