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Billing code

E746A — Sigmoidoscopy outside hospital – premium

Office rigid sigmoidoscopy premium

Add when a rigid sigmoidoscopy (Z535, Z536 or Z592) is done outside hospital.

Watch for: Only with Z535, Z536 or Z592; colonoscopy or flexible sigmoidoscopy in a private office uses E749.

Code

E746A

Description

Sigmoidoscopy outside hospital – premium

FHO+ basket

Not in the FHO+ base rate basket (Schedule 2 or 2B).

Effective date

Apr 1, 2025

Termination date

No end date

Explanation

Updated October 26, 2026

Add-on when a rigid sigmoidoscopy (Z535, Z536 or Z592) is performed outside hospital.

What it covers

E746 is added when Z535, Z536 or Z592 is performed outside hospital (S25).

Billing rules

• Only with Z535, Z536 or Z592 (S25).
• Only when performed outside hospital (S25).
• Colonoscopy, Z512 or Z580 in a private office uses E749 instead (S18).

Often billed with

• Z535, Z536 or Z592 (S25).

Common rejections

• ADF: OHIP describes this as 'Corresponding Procedure Invalid, Omitted or Paid at zero': the base procedure (Z535, Z536 or Z592) is missing from the claim, invalid, or paid at zero. Add-ons are payable only with their base code.

Related codes: Z535, Z536, Z592, E749, E542

Source: Schedule of Benefits (July 1, 2026), Digestive System Surgical Procedures, Rectum, page S25.

APEX checks every paid claim against the Schedule of Benefits and flags codes billed below what the visit qualified for. See how APEX works · Pricing