Z637 – Percutaneous ablation of calyceal diverticulum
OHIP Psychiatric Code — UROGENITAL AND URINARY SURGICAL PROCEDURES · Schedule of Benefits
This surgical procedure involves the percutaneous (through the skin) ablation (destruction) of a calyceal diverticulum, which is a pouch-like structure in the kidney's collecting system. The service explicitly includes the dilation of the communication channel between the diverticulum and the renal calyx, as well as fulguration (destruction of tissue using high-frequency electric current) to treat the diverticulum.
When to Use
- Use Z637 specifically for the percutaneous ablation of a calyceal diverticulum where both the dilation of the communication channel and the fulguration of the diverticulum are performed.
- Select Z637 when the procedure is performed percutaneously; do not use this code for open surgical excision or laparoscopic approaches, which require different procedural codes.
Common Pitfalls
- Billing Z637 in conjunction with other percutaneous renal procedures (such as stone extraction) may trigger a 'duplicate' or 'inclusive' service rejection if the Ministry deems the components part of a single operative session.
- Failure to document the specific fulguration of the diverticulum lining can lead to audit recovery, as the code definition explicitly includes this step.
Billing Tips
- Ensure that the operative report explicitly details the dilation of the infundibulum or communication channel to justify the use of Z637 over simpler diagnostic or drainage codes.
Effective: April 1, 2025
T. Urogenital and Urinary Surgical Procedures
UROGENITAL AND URINARY SURGICAL PROCEDURES
Surgical
Urogenital and Urinary Surgical Procedures
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