Error report · Service, fee & diagnosis
OHIP error code A34
Multiple duplicate claims
What A34 means
The Ministry of Health’s official wording for A34 is: “Multiple duplicate claims.”
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 A34
Duplicate claims were submitted - check your records and prior remittance advices to confirm no copy was already accepted or paid, then submit the service once.
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
- A3ENo such service code for date of service
- A3FNo fee exists for this service code on this date of service
- A3GFee Billed Low
- A3HMaximum Number Services per the Fee Schedule Master (FSM)
- A3IX-Ray Code - Maximum Number Services per the Fee Schedule Master (FSM)
- A3LOther New Patient Fee Already Paid
- AC1Maximum reached-resubmit alternate Fee Schedule Code (FSC)
- AD3Not allowed with visit
Tired of decoding rejections by hand?
MedConcierge explains every rejection on your reports and helps you fix and resubmit in clicks. OHIP billing built by physicians, for physicians.
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.