OHIP explanatory code MS

What MS means

The Ministry of Health’s official wording for MS is: “Maximum allowed for sleep studies in a specific period by one or more physicians has been reached.”

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 MS

The fee was reduced or capped under this rule. If you believe the full amount was payable, file a Remittance Advice Inquiry with supporting detail.

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

• MMClaim does not meet requirements of the Physician Schedule of Benefits
• MNMaximum number of occipital nerve block sessions has been reached
• MOMaximum number of Optical Coherence Tomography (OCT) services has been reached
• MRMinimum service requirements have not been met
• MUMaximum Units Exceeded
• MWMaximum Number of Weeks has elapsed since payment of initial service
• MXMaximum of 2 arthroscopy "R" codes with E595 has been reached
• MYYearly maximum has been exceeded