Billing code
G658A — Continuous ECG monitoring (Holter) Level 1 – professional component – 36 to 59 hours
Level-1 Holter reading, 36–59 hours
Bill G658 for personally interpreting a Level 1 continuous ECG recording of 36 to 59 hours.
Watch for: Bill the code for the full duration; don't bill multiples of shorter-duration codes.
| Provider | Specialist | Assistant | Anaesthetist | Non-anaesthetist |
|---|---|---|---|---|
| $75.45 | $0.00 | $0.00 | $0.00 | $0.00 |
- Code
- G658A
- Description
- Continuous ECG monitoring (Holter) Level 1 – professional component – 36 to 59 hours
- 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
Level 1 continuous ambulatory ECG (Holter-type) monitoring, professional component, for a recording of 36 to 59 hours.
What it covers
G658 is the professional component of Level 1 continuous ECG monitoring (for example Holter) for 36 to 59 hours (J16).
Level 1 needs a device that records three or more channels at once, captures every beat continuously with three or more skin electrodes, allows analysis and manual review of all parts of the recording, produces graphical and quantitative reports, and has a patient diary and event marker. Minimum 12 hours of monitoring (J16).
Billing rules
- Minimum 12 hours of monitoring; the device must meet the Level 1 definition (J16).
- Maximum one professional component, one technical recording component and one technical scanning component per patient, per recording (J16).
- For recordings over 36 hours, bill the code for that duration; don't bill multiples of shorter-duration codes (J17).
- External loop recorders that rely only on patient activation and can't analyze rhythm in real time are not insured (J17).
- The report must state the number of channels, whether the recording was continuous, whether analysis was real-time, post-hoc or both, and the device manufacturer and model (J17).
- You must personally interpret the results to bill the professional component (J1).
Often billed with
- G682 technical recording component for the same recording (J16).
- G683 technical scanning component for the same recording (J16).
Related codes: G682, G683, G686, G687, G656
Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Electrocardiography (ECG) – Continuous ECG Monitoring, page J16; notes J17.
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