OHIP explanatory code 37

What 37 means

The Ministry of Health’s official wording for 37 is: “Effective April 1, 1993 the listed benefit for this code is 0 Laboratory Medicine Services (LMS) units.”

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 37

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

• 32OHIP records show service(s) on this day claimed previously
• 33Approved
• 35OHIP records show this service rendered has been claimed previously (used on Pay Practitioner duplicate claims)
• 36OHIP records show service has been rendered by another Practitioner, Group, Lab
• 40Service or related service allowed only once for same patient
• 41Fee Schedule Code (FSC) Billed - No Evidence in Supporting Documentation Provided
• 42FSC Billed Included in Other Procedure
• 45Specialty code restriction on Fee Schedule Code