A120 – Colonoscopy assessment, same day as colonoscopy
OHIP General Listings Code — CONSULTATIONS AND VISITS · Schedule of Benefits
A120 is a specific assessment code used by Internal Medicine or Gastroenterology specialists when an assessment is performed on the same day as a colonoscopy. It is designed to be the only assessment payable on the same day as the procedure when a major pre-operative visit has already occurred within the previous 12 months.
When to Use
- Bill A120 for an Internal Medicine or Gastroenterology specialist's assessment of a patient on the same day they undergo a colonoscopy, provided a major pre-operative visit (GP4) occurred within the last 12 months.
- Use A120 when the assessment is specifically for the colonoscopy procedure itself, and not for a separate, unrelated medical issue arising on the same day.
Common Pitfalls
- Billing a general assessment code (e.g., K005) instead of A120 when the assessment is performed on the same day as a colonoscopy, leading to rejection.
- Claiming A120 when a major pre-operative visit has not occurred within the preceding 12 months; in such cases, a different assessment code should be used.
Billing Tips
- Ensure the patient's chart clearly indicates the date of the colonoscopy and the date of the preceding major pre-operative visit to support the A120 claim.
- A120 is the sole assessment code payable on the same day as a colonoscopy; do not bill other assessment codes concurrently for the same encounter.
Effective: June 1, 2025
A. Consultations and Visits
CONSULTATIONS AND VISITS
Consultations and Visits
Assessment
For assessments claimed same day as colonoscopy by Internal Medicine (13) or Gastroenterology (41), A120 must be used instead of other assessment codes.
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