Billing code
G458A — Single Fibre Electromyography
Single fibre EMG
Bill G458 for single fibre electromyography using an intramuscular needle recording electrode.
Watch for: With G473, G458 is payable only if its time isn't counted toward G473's 60-minute minimum.
| Provider | Specialist | Assistant | Anaesthetist | Non-anaesthetist |
|---|---|---|---|---|
| $275.00 | $0.00 | $0.00 | $0.00 | $0.00 |
- Code
- G458A
- Description
- Single Fibre Electromyography
- FHO+ basket
- Not in the FHO+ base rate basket (Schedule 2 or 2B).
- Effective date
- Apr 1, 2026
- Termination date
- No end date
Explanation
Updated October 26, 2026
Single fibre electromyography (needle EMG technique) for neuromuscular testing.
What it covers
G458 is single fibre electromyography, listed with the needle EMG and nerve conduction services (J105).
Like Schedules A to C, it uses an intramuscular needle recording electrode (J103).
Billing rules
- Schedules A, B, C and single fibre EMG require an intramuscular needle recording electrode. Surface EMG and other EMG techniques are not payable (J103).
- If the patient is referred directly to the EMG/nerve conduction facility for testing, a consultation or assessment by you is not payable, unless the referring provider also asks for a medically necessary consultation or assessment (J103).
- With G473 (Schedule C), G458 is payable only if its time is not counted toward G473's 60-minute minimum (J104).
Related codes: G473, G456, G457, G455, G471
Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Physical Medicine, Needle Electromyography and Nerve Conduction Studies, page J105.
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