What is OHIP billing code S170?

S170 is "Ileostomy - plus total colectomy plus abdomino-perineal resection", an OHIP Urology code from the Ontario Schedule of Benefits (Physician Services).

How much does S170 pay?

The current OHIP fee for S170 is $2486.50, effective 2026-04-01, per the Ontario Schedule of Benefits.

How do I bill S170 to OHIP?

S170 is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates S170 claims against the Schedule of Benefits rules before submission.

What codes are related to S170?

Codes related to S170 in the Schedule of Benefits include S168, S169, S173, S174, E793, E738.

All codes

S170

S170 – Ileostomy - plus total colectomy plus abdomino-perineal resection

OHIP Urology Code — DIGESTIVE SYSTEM SURGICAL PROCEDURES · Schedule of Benefits

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This service involves the surgical creation of an ileostomy with the removal of the entire colon (total colectomy) and the rectum (abdomino-perineal resection). The service is eligible for assistant and anaesthesiologist fees, which are calculated using a time-based unit system. The procedure can be performed laparoscopically or with laparoscopic assistance, which is payable as an add-on (E793). It may also be performed with a continent ileostomy (E738). As a surgical procedure, it includes all common elements of insured services as described in the General Preamble (, ).

When to Use

Use S170 for a total proctocolectomy with ileostomy, typically performed for ulcerative colitis or familial adenomatous polyposis.
Select S170 when the procedure involves the complete removal of the colon and rectum with the creation of an ileostomy, distinguishing it from S168 or S169 which involve different extents of resection.

Common Pitfalls

Billing S170 in conjunction with other colonic resection codes is generally considered unbundling; ensure the procedure is not captured by a more specific or inclusive code.
Failing to append the E793 add-on code when performing the procedure laparoscopically results in a 25% loss of the potential surgical fee.
Incorrectly billing E738 as a separate procedure; it must be submitted as an add-on to the base S170 code to be processed correctly.

Billing Tips

Always verify the documentation supports the 'laparoscopic' or 'laparoscopic-assisted' designation before applying the E793 premium to avoid audit triggers.
If the procedure is performed after hours or at night, ensure you apply the appropriate E409 or E410 premium to the base fee, as these are calculated on the total surgical value.

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Provider Fee$2,486.50

Surgical Assistant Fee$116.19

Anaesthetist Fee$159.60

Non-Anaesthetist Fee$159.60

Effective: April 1, 2026

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