All codes
Z593
Z593 – Nasobiliary catheter insertion
OHIP Psychiatric Code — DIGESTIVE SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
This service is for the insertion of a nasobiliary catheter. As a surgical procedure, this service includes all common elements as defined in - of the Schedule.
When to Use
- Use Z593 specifically for the placement of a nasobiliary catheter during an endoscopic procedure to facilitate biliary drainage.
- Select Z593 when the primary intent of the procedure is the establishment of external biliary access via the nose, distinct from simple diagnostic ERCP codes like Z561.
Common Pitfalls
- Billing Z593 in conjunction with other endoscopic procedures may trigger 'incidental procedure' rejections if the documentation does not clearly support the necessity of the catheter placement as a distinct therapeutic action.
- Failing to account for the 'common elements' rule means you cannot bill a separate consultation or assessment fee on the same day unless the assessment is for an unrelated condition.
Billing Tips
- Ensure the operative report explicitly details the catheter placement technique, as Z593 is a surgical procedure code that requires clear evidence of the invasive intervention to pass audit.
Ready to bill this code?
SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.