What are the billing rules for C033A?

Limited to 1 per patient per physician in 12 months, or 2 if the second visit is for a clearly different diagnosis; extra ones are paid at a lesser fee (GP23). As a surgeon, you cannot bill the hospital admission assessment unless it is the major pre-operative visit (the visit where the decision to operate is made) (SP2, GP40, GP4). Only one consultation or assessment is payable per admission when care is transferred between physicians (GP40).

What is C033A often billed with?

E082 MRP admission premium when it is your admission assessment as most responsible physician (GP42).

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Billing code

C033A — Specific Assessment

Q: What is OHIP billing code C033A?

General surgeon's specific assessment of a hospital in-patient: full history of the complaint and detailed exam of the affected area or system.

General surgery in-patient specific assessment

Bill C033 for a general surgeon's full history of the complaint and detailed exam of the affected area for a hospital in-patient.

Watch for: A surgeon can't bill the admission assessment unless it is the visit where the decision to operate is made.

Provider	Specialist	Assistant	Anaesthetist	Non-anaesthetist
$0.00	$56.40	$0.00	$0.00	$0.00

Code: C033A
Description: Specific Assessment
FHO+ basket: Not in the FHO+ base rate basket (Schedule 2 or 2B).
Effective date: Apr 1, 2026
Termination date: No end date

Explanation

Updated October 26, 2026

General surgeon's specific assessment of a hospital in-patient: full history of the complaint and detailed exam of the affected area or system.

What it covers

C033 is a specific assessment for a non-emergency hospital in-patient in the General Surgery (03) listings (A107). The office version is A033.

A specific assessment is a specialist service, not in the patient's home, with a full history of the presenting complaint and a detailed exam of the affected part, region or system (GP23).

Billing rules

Limited to 1 per patient per physician in 12 months, or 2 if the second visit is for a clearly different diagnosis; extra ones are paid at a lesser fee (GP23).
As a surgeon, you cannot bill the hospital admission assessment unless it is the major pre-operative visit (the visit where the decision to operate is made) (SP2, GP40, GP4).
Only one consultation or assessment is payable per admission when care is transferred between physicians (GP40).
Routine visits after the admission assessment are subsequent visits (C032, C037, C039) (GP43).
For emergency calls and other special visits to in-patients, use the General Listings and special visit premiums (A107).

Often billed with

E082 MRP admission premium when it is your admission assessment as most responsible physician (GP42).

Related codes: A033, C034, C035, C032, C036

Source: Schedule of Benefits (July 1, 2026), Consultations and Visits, General Surgery (03), page A107.

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