How do I fix OHIP error code EN?

Check which enrolment models can bill the code (Schedule Appendix Q and your model's agreement). Check that the claim used the right group number and that the patient is enrolled where required. If the claim details were wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with the correct details. If the code isn't available to your model, bill the code that applies to you instead.

When shouldn't I resubmit a EN claim?

Your enrolment model can't bill this code. The claim is already on your RA. A new claim for the same service will be treated as a duplicate. Use an RAI instead.

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Error code

EN — Network billing not allowed

Q: What does OHIP error code EN mean?

EN means OHIP refused this line because network billing isn't allowed for it. Check your enrolment model and the code's rules.

Network billing not allowed

Network billing isn't allowed for this line; some codes are only payable to physicians in certain enrolment models such as FHN or FHO.

What to do: Check which enrolment models can bill the code, and that the claim used the right group number.

Code: EN
Description: Network billing not allowed

Explanation

Updated October 26, 2026

EN means OHIP refused this line because network billing isn't allowed for it. Check your enrolment model and the code's rules.

What it means

EN appears on the Remittance Advice (RA) when OHIP refuses a line because network billing is not allowed for it. Some codes can only be billed by physicians in certain patient enrolment models, such as Family Health Networks (FHN) and Family Health Organizations (FHO).

On the Error Report the matching rejection is EPA (network billing not approved). For example, the Q590A flu shot premium is payable only to physicians in an FHN or FHO. If anyone else bills it, the claim is rejected with EPA (OMA Q-codes guide p.15).

Common causes

A code that only certain enrolment models can bill was billed by a physician outside those models
The patient isn't enrolled to the physician's network
The claim was submitted under the wrong group number

How to fix it

Check which enrolment models can bill the code (Schedule Appendix Q and your model's agreement).
Check that the claim used the right group number and that the patient is enrolled where required.
If the claim details were wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with the correct details.
If the code isn't available to your model, bill the code that applies to you instead.

Don't resubmit if

Your enrolment model can't bill this code.
The claim is already on your RA. A new claim for the same service will be treated as a duplicate. Use an RAI instead.

How APEX handles it

APEX reads your error reports and remittance advice from MCEDT and lists claims rejected with this code in its Correction Centre for you to correct and resubmit. See how APEX works · Pricing

Related codes: EPA, EPC, 31