G657 – Professional component - 60 hours to 13 days recording
OHIP Diagnostic & Therapeutic Procedures Code — DIAGNOSTIC AND THERAPEUTIC PROCEDURES · Schedule of Benefits
This service represents the professional component for Level 2 continuous ambulatory electrocardiographic monitoring (e.g., Holter monitoring) for a recording period of 60 hours up to 13 days. Level 2 Definition: Level 2 monitoring is defined on as utilizing '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.' The professional component (G657) covers the physician's work in analyzing and interpreting the collected data and producing a report. It is typically billed in conjunction with the corresponding technical components for recording (G688) and scanning (G689). As per , only one professional component, one technical recording component, and one technical scanning component may be claimed per patient, per recording period.
When to Use
- Use G657 when interpreting Level 2 extended ambulatory ECG data lasting between 60 hours and 13 days that utilizes fewer than three skin electrodes.
- Select G657 instead of G653 or G656 when the recording duration exceeds 48 hours but remains under the 13-day limit.
Common Pitfalls
- Billing G657 more than once for the same recording period, which violates the J16 restriction of one professional component per patient per recording.
- Attempting to bill G657 without the corresponding technical components G688 and G689, which are required to complete the diagnostic service claim.
Billing Tips
- Ensure the referral source is documented as a physician, nurse practitioner, or oral maxillofacial surgeon to satisfy the mandatory referral requirement for this diagnostic procedure.
Effective: April 1, 2025
J. Diagnostic and Therapeutic Procedures
DIAGNOSTIC AND THERAPEUTIC PROCEDURES
Diagnostic
Diagnostic and Therapeutic Procedures
Maximum one professional component, one technical recording component and one technical scanning component per patient, per recording.
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