G685 – Technical component - 60 hours to 13 days scanning
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
This is the technical component for the scanning of a Level 1 continuous ambulatory electrocardiographic recording. This service covers a monitoring period of 60 hours to 13 days. Level 1 monitoring requires a device capable of recording three or more simultaneous channels and the acquisition of a continuous ambulatory electrocardiographic recording of all beats, using three or more skin electrodes. The device must also have the ability to analyze and manually review all parts of the recording, and to produce graphical and quantitative reports of relevant parameters and diagnostic quality tracings for visual review, including post-hoc review of any portion of the recording to enable diagnostic rhythm analysis. Must include a patient diary and event marker capability to enable symptom-rhythm correlation. Minimum 12 hours of monitoring.
When to Use
- Use G685 when the patient requires extended ambulatory ECG monitoring (60 hours up to 13 days) using a 3+ channel device that allows for full disclosure review.
- Select G685 instead of G682 or G683 when the monitoring duration exceeds 48 hours but remains under the 13-day limit.
Common Pitfalls
- Billing G685 for devices that do not support 3+ simultaneous channels or lack full disclosure/manual review capabilities will result in audit recovery.
- Submitting G685 when the monitoring duration is less than 60 hours is a common error; use G682 or G683 for shorter durations.
- Failing to account for the 86.10% fee reduction when the technical component is performed within a hospital setting leads to overpayment claims.
Billing Tips
- Ensure the patient diary and event marker data are retained as part of the technical record, as these are mandatory requirements for G685 eligibility.
- Always pair G685 with the appropriate professional interpretation code (e.g., G684) to ensure the full diagnostic service is captured, while respecting the limit of one technical and one professional component per recording.
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 the above upon request by the MOH.
1. Maximum one professional component, one technical recording component and one technical scanning component per patient, per recording.
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