All codes
Z493
Z493 – Follow up of normal colonoscopy - sigmoid to descending
OHIP Digestive System Surgical Procedures Code — DIGESTIVE SYSTEM SURGICAL PROCEDURES · Schedule of Benefits
Follow up of normal colonoscopy (Z497, Z555), absence of intervening signs or symptoms - sigmoid to descending. This is an endoscopic examination of the sigmoid and descending colon for a patient who had a previous normal colonoscopy and has remained asymptomatic. A colonoscopy is defined as 'normal' for this purpose if it showed no polyps or only small (<1 cm) hyperplastic polyps. Effective July 1, 2026, this listing was changed to align with updated ColonCancerCheck recommendations (INFOBulletin 260702); claims system updates were completed in August 2026 (INFOBulletin 260801). Z580 is not eligible for payment with Z493 same patient same day, and only one of Z491, Z492, Z493, Z494, Z495, Z496, Z497, Z498, Z499 or Z555 is eligible for payment per patient per day.
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