Error report · Service, fee & diagnosis
OHIP error code V21
Diagnostic Code Required
What V21 means
The Ministry of Health’s official wording for V21 is: “Diagnostic Code Required.”
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 V21
Add the correct 3-digit OHIP diagnostic code (look it up in the OHIP Diagnostic Codes tool) and resubmit.
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
- V16Unacceptable Diagnostic Code Not numeric
- V17Payee must be 'P' (Provider) or 'S' (Patient)
- V18Invalid Admission/First Visit date
- V20Unacceptable Age for Diagnostic code - Service code is A007, patient is over 2 years old and diagnostic code is '916' or service code is A003 and the patient is under 16 years old and the diagnostic code is '917'
- V22Invalid Diagnostic Code
- V23Check Number Of Services
- V28Invalid Hospital Number
- V29Invalid In-Out-Patient Indicator
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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.