All OHIP error & explanatory codes

Remittance Advice · Payment-time (remittance)

OHIP explanatory code I4

Records show service has been rendered by another Practitioner, Group or IHF

What I4 means

The Ministry of Health’s official wording for I4 is: “Records show service has been rendered by another Practitioner, Group or IHF.”

This code appears as an explanatory code on your monthly Remittance Advice (RA). It means the claim was adjudicated — paid, reduced, or refused — for the reason below. A claim already on your RA generally shouldn't be blindly resubmitted; follow the suggested action.

How to fix I4

If you provided or assessed the patient first, file a Remittance Advice Inquiry with supporting documentation.

Payment-time codes appear on the monthly Remittance Advice after adjudication. Some are informational, some explain a reduced or refused payment. Where you disagree with the outcome, the usual route is a Remittance Advice Inquiry or written inquiry — not resubmitting the same claim, which can create a duplicate.

Related codes

Code meaning per Ontario Ministry of Health — Remittance Advice Explanatory Codes / Messages (March 2026). The suggested action is general information for Ontario physicians, not billing, legal, or tax advice — codes and rules change, so verify against the current Ministry of Health documents before relying on a claim.