Error report · Referral & provider
OHIP error code A4D
Invalid specialty for this service code
What A4D means
The Ministry of Health’s official wording for A4D is: “Invalid specialty for this service code.”
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 A4D
Your specialty isn't eligible to bill this code - bill it under an eligible specialty or use the correct code, then resubmit.
Referral and provider codes relate to the referring or rendering provider number, specialty restrictions, or referral requirements attached to the fee code. Verify the provider numbers on the claim and whether the code requires a valid referral.
Related codes
- A36Claimed by Other Practitioner
- AC4Unaccepted Referral Number. Not 6 numerics Equal to the Practitioner billing number Referring number is 722900-744292 (Nurse Practitioner (NP)) and FSC is not eligible for NP referral. Referring number is 700000-722899 (Midwife (MW)) and FSC is not eligible for MW referral.
- ARFMissing Physician Referring Number
- ARPReferring Physician Number Required
- EG1Group not Eligible
- ENPInvalid FSC for Nurse Practitioner (NP)
- EP5Incorrect FSC for Group Type
- EQ1Clinic/Doctor Not on File - Practitioner not registered with OHIP
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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.