G545 – Professional component of prolonged EEG monitoring
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Professional component for prolonged EEG monitoring which includes videotape recording of clinical signs in association with spontaneous electroencephalogram (EEG). This service is time-based, with a unit defined as a quarter-hour or a major part thereof. As per , time-keeping requirements must be met, including recording start and end times in the patient's medical record. This fee is for the physician's professional work, separate from the technical component (G540). Payable at nil if claimed with any baseline EEG.
When to Use
- Use G545 when providing the professional interpretation and review of prolonged video-EEG monitoring data, distinct from the technical setup billed under G540.
- Apply this code for time-based professional oversight of long-term monitoring sessions where the physician is actively reviewing clinical signs correlated with spontaneous EEG activity.
Common Pitfalls
- Claiming G545 on the same day as any other professional EEG service will result in an automatic rejection, as it is strictly prohibited by the Schedule of Benefits.
- Failing to document exact start and end times in the patient record is a primary cause for audit recovery, as the code is strictly time-based per quarter-hour.
- Submitting more than 18 units per service date or exceeding 14 services per hospital admission will trigger a hard rejection based on the defined maximums.
Billing Tips
- Ensure your documentation clearly distinguishes the professional review time from the technical recording time to satisfy the GP7 audit requirements.
- Verify that no baseline EEG services are billed on the same date of service, as G545 will be paid at nil if any other professional EEG code is present.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Diagnostic
Diagnostic and Therapeutic Procedures
The physician must record on the patient's permanent medical record or chart the time when the insured service started and ended.
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