S450 – Ureterectomy, other e.g. partial
OHIP Urology Code — UROGENITAL AND URINARY SURGICAL PROCEDURES · Schedule of Benefits
S450 is a surgical procedure listed in the Musculoskeletal System section of the Schedule of Benefits. As with other surgical procedures, the service includes pre-operative evaluation, the surgical procedure itself, and post-operative care as defined in the General Preamble. The fee payable is calculated by combining basic units and time-based units for the surgeon, surgical assistant, and anaesthesiologist. Specific elements for the surgical assistant are outlined on and for the anaesthesiologist on . Refer to the specific listing for S450 in the Schedule for a detailed description of the procedure.
When to Use
- Use S450 for partial ureterectomy procedures where the primary intent is the excision of a segment of the ureter, rather than a complete nephroureterectomy.
- Select S450 when performing a localized ureteral resection for benign strictures or localized pathology that does not involve the full removal of the kidney and ureter (which would be covered under codes like S453 or S454).
Common Pitfalls
- Billing S450 in conjunction with more extensive urological procedures without clear documentation of the separate surgical site or distinct pathology, which may trigger an audit for unbundling.
- Assuming a second surgical assistant is automatically payable; S450 is not on the pre-approved list, and claims without prior medical consultant authorization will be rejected.
Billing Tips
- Ensure the operative report explicitly details the extent of the ureteral resection to justify the use of S450 over more comprehensive urological codes like S453 or S454.
- If a second surgical assistant is medically necessary, submit the claim with a formal letter from the surgeon detailing the specific clinical justification to avoid automatic rejection.
Effective: April 1, 2026
T. Urogenital and Urinary Surgical Procedures
UROGENITAL AND URINARY SURGICAL PROCEDURES
Surgical
Musculoskeletal System Surgical Procedures
All insured services must be documented in appropriate records. The record must 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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