Remittance Advice · Payment-time (remittance)
OHIP explanatory code L1
This service paid to another laboratory
What L1 means
The Ministry of Health’s official wording for L1 is: “This service paid to another laboratory.”
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 L1
This explains a payment adjustment. If you believe the claim was billed correctly, file a Remittance Advice Inquiry within the deadline; otherwise no resubmission is needed.
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
- J5Coverage Applied For; Premiums Not Yet Paid
- J7Claim submitted three months after service date
- J8Coverage Not In Effect; Services Provided On Or After The 20th Of This Month Will Not Be Paid Unless Subscriber Takes Corrective Action
- J9Coverage Reinstated. Submit Claims Routinely
- L2Not allowed to medical Laboratory Director
- L3Not allowed in addition to other laboratory procedure(s)
- L4Not allowed to attending physicians
- L5Not allowed in addition to other procedure paid to another laboratory
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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.