Remittance Advice · Payment-time (remittance)
OHIP explanatory code O2
Previous prenatal care already claimed
What O2 means
The Ministry of Health’s official wording for O2 is: “Previous prenatal care already claimed.”
This code appears as an explanatory code on your monthly Remittance Advice (RA). It means the claim was adjudicated — paid, reduced, or refused — for the reason below. A claim already on your RA generally shouldn't be blindly resubmitted; follow the suggested action.
How to fix O2
OHIP shows this was already paid - confirm it is not a true duplicate; file a Remittance Advice Inquiry with detail if the service was genuinely separate.
Payment-time codes appear on the monthly Remittance Advice after adjudication. Some are informational, some explain a reduced or refused payment. Where you disagree with the outcome, the usual route is a Remittance Advice Inquiry or written inquiry — not resubmitting the same claim, which can create a duplicate.
Related codes
- MUMaximum Units Exceeded
- MWMaximum Number of Weeks has elapsed since payment of initial service
- MYYearly maximum has been exceeded
- O1Fee for obstetric care apportioned
- O3Previous prenatal care already claimed by another doctor
- O4Office visits relating to pregnancy and claimed prior to delivery included in obstetric fee
- O5Not allowed in addition to delivery
- O6Medical induction/stimulation of labour allowed once per pregnancy
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Code meaning per Ontario Ministry of Health — Remittance Advice Explanatory Codes / Messages (March 2026). 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.