Remittance Advice · Payment-time (remittance)
OHIP explanatory code SX
ICU Per Diem code Paid To Another Physician, MRP Premium Not Allowed
What SX means
The Ministry of Health’s official wording for SX is: “ICU Per Diem code Paid To Another Physician, MRP Premium Not Allowed.”
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 SX
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
- SFMost Responsible Physician (MRP) visit not allowed during post- operative period-surgical fee adjusted
- SNMultiple Surgical Anaesthesia. Documentation of Separate Surgeries Same Day/Same Patient Required
- SVMRP visit not allowed during post-operative period-fee reduced to subsequent visit fee
- SWIntensive Care Unit per diem code paid to another physician-MRP subsequent visit reduced to subsequent visit
- T1Fee allowed according to surgery claim
- V1Allowed as repeat assessment-initial assessment previously claimed
- V2Allowed as extra patient seen in the home
- V3Not allowed in addition to procedural fee
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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.