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Billing code

G545A — Professional Component ... Per Unit

Prolonged video-EEG interpretation

Bill G545 per quarter-hour unit for interpreting prolonged EEG monitoring with video of clinical signs.

Watch for: Maximum 18 units per patient per day, and it pays nil when claimed with any baseline EEG.

Code

G545A

Description

Professional Component ... Per Unit

FHO+ basket

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

Effective date

Apr 1, 2025

Termination date

No end date

Explanation

Updated October 26, 2026

Professional component of prolonged video-EEG monitoring, billed per quarter-hour unit.

What it covers

Prolonged EEG monitoring is video recording of clinical signs together with spontaneous EEG. A unit is ¼ hour or major part; see GP7 for time keeping (J85).

The technical component is G540 (maximum 12 units) (J85).

Billing rules

• Paid at nil if claimed with any baseline EEG (J85).
• Limited to 18 units per patient per service date and 14 services per hospital admission (J85).
• Not payable for routine physiological surveillance, including depth of sedation or anaesthesia (J85).
• Not payable on any service date when another professional EEG service is payable (J85).
• No EEG service is payable with an overnight or daytime sleep study (J898, J899, J990, J896, J897, J895, J890, J889, J893 or J894) (J84).

Often billed with

• G540 prolonged EEG monitoring technical component, per unit (J85).

Common rejections

• A3H: More units were billed than OHIP allows; G545 is limited to 18 units per patient per service date (J85).

Related codes: G540, G496, G555, G415, G543

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Neurology, Electroencephalography, page J85.

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