G688 – Technical component - 60 hours to 13 days recording
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
Level 2
All other monitoring devices with fewer than three skin electrodes, or that record only portions of the monitoring period or do not provide trend analysis. Minimum 12 hours monitoring.
`G688` is the technical component for a 60 hours to 13 days recording. This service is one of three components for a complete Holter service, which also includes a technical scanning component (G689) and a professional component (G657).
When to Use
- Use G688 when providing extended cardiac monitoring (60 hours to 13 days) using devices that utilize fewer than three skin electrodes.
- Select G688 for monitoring devices that record only intermittent portions of the monitoring period or lack automated trend analysis features.
- Use G688 as the technical recording component when the total duration of the study exceeds the 48-hour threshold defined for G686 or G687.
Common Pitfalls
- Billing G688 in conjunction with G686 or G687 for the same patient recording period will result in a rejection for duplicate service.
- Submitting G688 without an associated G689 scanning component and G657 professional component often triggers an audit of the complete diagnostic service package.
- Failing to meet the minimum 12-hour recording requirement will lead to a claim rejection, even if the device was worn for a longer duration.
Billing Tips
- Ensure the technical component fee is adjusted to 86.10% if the recording service is performed within a hospital facility rather than a private clinic.
- Maintain a clear log of the device's electrode configuration and recording capabilities to justify the use of G688 over higher-tier monitoring codes.
Effective: April 1, 2026
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Diagnostic
Diagnostic and Therapeutic Procedures
The physician submitting a claim for the technical component is responsible for the complete quality assurance process for all elements of the technical component of the service, including data acquisition, reporting, and record keeping.
The physician must be able to demonstrate quality assurance upon request by the MOH.
The physician has the necessary training and experience to personally render the technical component of the service.
The physician maintains documentation that describes the process by which the physician monitors quality assurance in accordance with professional standards.
Maximum one professional component, one technical recording component and one technical scanning component per patient, per recording.
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