How do I fix OHIP error code SX?

Check the service date and whether another physician was billing a critical care per diem for the patient on that day. If so, the premium refusal is expected. Don't add E083 or E084 to visits in that situation. If the patient had already left the intensive care area, or was only there for monitoring, gather the transfer details and your notes. If you believe the payment is wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with supporting details.

When shouldn't I resubmit a SX claim?

The claim is already on the RA. Use an RAI, not a new claim, if you disagree with the payment.

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Error code

SX — ICU per diem paid to another physician - MRP premium not allowed

Q: What does OHIP error code SX mean?

Another physician was paid an ICU per diem for this patient, so the MRP premium on your visit (such as E083 or E084) was not paid.

MRP premium not paid

Another physician was paid an ICU per diem for this patient, so the most responsible physician premium (E083 or E084) wasn't paid.

What to do: Don't add E083 or E084 to visits on days another physician bills a critical care per diem.

Code: SX
Description: ICU per diem paid to another physician - MRP premium not allowed

Explanation

Updated October 26, 2026

Another physician was paid an ICU per diem for this patient, so the MRP premium on your visit (such as E083 or E084) was not paid.

What it means

The Ministry's wording for SX is that an ICU per diem code was paid to another physician, so the Most Responsible Physician (MRP) premium is not allowed. The premium line is not paid.

E083 (+30%) and E084 (+45% on Saturdays, Sundays and holidays) are only payable with subsequent visits and palliative care visits by the MRP (GP47). Critical care, ventilatory support and comprehensive care per diems (for example G400–G402, G405–G407, G557–G559) are team fees for the physicians caring for the patient in the intensive care area (J30–J32). When OHIP's records show another physician holding that per diem, it does not pay you the MRP premium.

Common causes

You added E083 or E084 to a visit while the patient was under another physician's critical care, ventilatory or comprehensive care per diem
The visit was on or near the day of transfer out of the intensive care area
The service date on your claim or the other physician's claim is wrong

How to fix it

Check the service date and whether another physician was billing a critical care per diem for the patient on that day.
If so, the premium refusal is expected. Don't add E083 or E084 to visits in that situation.
If the patient had already left the intensive care area, or was only there for monitoring, gather the transfer details and your notes.
If you believe the payment is wrong, send a Remittance Advice Inquiry (RAI) through eSubmit, or on form 0918-84, within 7 months of the RA date, with supporting details.

Don't resubmit if

The claim is already on the RA. Use an RAI, not a new claim, if you disagree with the payment.

How APEX handles it

APEX reads your error reports and remittance advice from MCEDT and lists claims rejected with this code in its Correction Centre for you to correct and resubmit. See how APEX works · Pricing

Related codes: SW, SV, AO3