Error report · Service, fee & diagnosis
OHIP error code AT3
No Patient-Physician Relationship
What AT3 means
The Ministry of Health’s official wording for AT3 is: “No Patient-Physician Relationship.”
This code appears on your Claims Error Report (downloaded through MCEDT). It means the claim was rejected at submission and was never adjudicated for payment — fix the issue below and resubmit the claim.
How to fix AT3
This virtual-care code requires an existing patient-physician relationship. Bill the code for an unattached patient instead, or confirm the relationship criteria are met.
These codes relate to the fee schedule code, diagnosis code, fee amount, or service limits in the Schedule of Benefits. The fix usually starts with re-reading the code's payment rules — effective dates, age/sex limits, maximums, and combinations — for the date of service.
Related codes
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Code meaning per Ontario Ministry of Health — Error Report Rejection Conditions / Error Codes (December 2022). 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.