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Billing code

G466A — EMG/nerve conduction Schedule B (limited) – technical component

Limited EMG/nerve study, technical

Bill G466 for the technical part of a limited nerve conduction or needle EMG study, such as a single nerve.

Watch for: Not payable with G471 for the same patient the same day; surface EMG is not payable.

Code

G466A

Description

EMG/nerve conduction Schedule B (limited) – technical component

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

Technical component of a limited nerve conduction or needle EMG study (Schedule B), such as a single nerve.

What it covers

Schedule B is the limited procedure: conduction studies on a single nerve (motor and/or sensory) and/or limited EMG of the involved muscle(s), and/or a limited neuromuscular transmission study (J103).

The professional component is G457 (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 you own the equipment and either do the test yourself or employ and supervise a technician, you can bill both the technical and professional components (J103).
• G471 (Schedule C technical) is not payable with G466 for the same patient the same day (J104).
• When rendered in a hospital, this technical component is paid at 86.10% of the listed fee (GP11).
• Not payable for a hospital in-patient, or for a patient admitted to the same hospital within 24 hours for the same condition (GP11).
• You must have the training and experience to render the technical component and keep documentation of your quality-assurance process (GP11).

Often billed with

• G457 Schedule B professional component (J103).

Common rejections

• ADH: OHIP describes this as 'Cannot be billed together': G471 and G466 can't be paid for the same patient the same day (J104).

Related codes: G457, G455, G456, G471, G473

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Physical Medicine, Needle Electromyography and Nerve Conduction Studies, page J103. Rules GP11.

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