How do I fix OHIP error code O1?

Check the amount paid against the care you provided. For transfers of an uncomplicated patient, the second physician bills an assessment followed by prenatal visits (Schedule K2). If you believe the decision is wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with supporting details.

When shouldn't I resubmit a O1 claim?

The line is already on your RA. Question it with an RAI, not a new claim.

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Error code

O1 — Obstetric care fee split between providers

Q: What does OHIP error code O1 mean?

O1 means the obstetric care fee was split between providers. Check that your share matches the care you gave.

Obstetric fee split

The obstetric care fee was divided between more than one provider.

What to do: Check that the amount paid matches the care you gave; if not, send a remittance advice inquiry.

Code: O1
Description: Obstetric care fee split between providers

Explanation

Updated October 26, 2026

O1 means the obstetric care fee was split between providers. Check that your share matches the care you gave.

What it means

O1 means the fee for obstetric care was apportioned, or divided, between more than one provider.

Common causes

The patient's care was transferred between physicians during the pregnancy

How to fix it

Check the amount paid against the care you provided.
For transfers of an uncomplicated patient, the second physician bills an assessment followed by prenatal visits (Schedule K2).
If you believe the decision is wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with supporting details.

Don't resubmit if

The line is already on your RA. Question it with an RAI, not a new claim.

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: O3, F2