OHIP Remittance Advice code MW

Maximum Number of Weeks has elapsed since payment of initial service

Ontario Ministry of Health, Remittance Advice Explanatory Codes

Where you’ll see it

On your Remittance Advice. The claim was assessed, and this explanatory code says how it was paid, reduced or refused. The Remittance Advice arrives monthly, in the first week.

Resubmitting usually won't change this

OHIP considers the service already paid, claimed by someone else, over its limit, or not insured. A corrected resubmission generally won't be paid. If you believe OHIP's records are wrong, raise it with the ministry instead of resubmitting.

For a claim already on your Remittance Advice, follow the ministry's instruction in the description. That is either a corrected resubmission or a Remittance Advice Inquiry (RAI), and both are still subject to the three-month limit from the date of service.

Our summary is a guide, not a ruling. The ministry’s wording and the current Schedule of Benefits are what OHIP applies. See OHIP Error Report vs Remittance Advice: reading the codes for how the two reports differ.

Related Remittance Advice codes

• MO · Maximum number of Optical Coherence Tomography (OCT) services has been reached
• MR · Minimum service requirements have not been met
• MS · Maximum allowed for sleep studies in a specific period by one or more physicians has been reached
• MU · Maximum Units Exceeded
• MX · Maximum of 2 arthroscopy "R" codes with E595 has been reached
• MY · Yearly maximum has been exceeded
• O2 · Previous prenatal care already claimed
• O3 · Previous prenatal care already claimed by another doctor