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Billing code

C183A — Medical Specific Assessment

Neurology in-patient specialist assessment

Bill C183 for a neurologist's full history of the presenting complaint and detailed exam of the affected systems for a hospital in-patient.

Watch for: One per patient per physician per 12 months, unless the diagnosis is clearly unrelated; E078 isn't payable for in-patients.

Code

C183A

Description

Medical Specific Assessment

FHO+ basket

Not in the FHO+ base rate basket (Schedule 2 or 2B).

Effective date

Jun 1, 2025

Termination date

No end date

Explanation

Updated October 26, 2026

A neurologist's full assessment of a hospital in-patient's presenting complaint with a detailed exam of the affected systems.

What it covers

A medical specific assessment needs a full history of the presenting complaint and a detailed examination of the affected part(s), region(s) or system(s) needed to make a diagnosis, exclude disease and/or assess function (GP23).

C183 is the Neurology (18) hospital in-patient listing (A144).

Billing rules

• Limited to 1 per patient per physician per 12 months. The limit rises to 2 if there is a clearly different, unrelated diagnosis, or if at least 90 days have passed and the second one is a hospital admission assessment (GP23).
• Medical specific assessments and complex medical specific re-assessments combined are limited to 4 per patient per physician per 12 months (GP23).
• If you have not assessed the patient for the same illness within 90 days, your admission assessment counts as a consultation or assessment. Only one consultation or assessment is payable per admission when the patient is transferred between physicians (GP40).
• E078 is not payable for in-patients (GP25).
• Video only (not phone), with K300A. For in-patients, virtual care is payable only if you are not the MRP, no physician with your expertise is on staff and present in the community (documented by the referrer), and the referrer assessed the patient in person within the 30 days before (Appendix J AJ2, A69).

Often billed with

• E082 (+30%) when this is your admission assessment as the MRP, once per admission (GP42).

Common rejections

• AT2: OHIP describes this as 'Must Include Video Modality': this code is on the video-only virtual list, so it can't be billed by phone (K301A) (Appendix J AJ2).

Related codes: C184, C181, C185, C113, A183, E082

Source: Schedule of Benefits (July 1, 2026), Consultations and Visits, Neurology (18), page A144. Rules GP23, GP40.

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