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Billing code

G471A — EMG/nerve conduction Schedule C (complex) – technical component

Complex EMG/nerve study, technical

Bill G471 for the technical part of complex electrodiagnostic testing with 10 or more studies and at least 60 minutes of physician involvement.

Watch for: Not payable with G455 or G466 for the same patient the same day.

Code

G471A

Description

EMG/nerve conduction Schedule C (complex) – 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 complex neuromuscular electrodiagnostic testing (Schedule C), 10 or more studies.

What it covers

Schedule C is complex neuromuscular electrodiagnostic testing needing at least 60 minutes of direct physician involvement and 10 or more studies, in any mix of nerve conduction, late motor response, needle EMG of distinct muscles, repetitive stimulation and autonomic function studies (J104).

For G471/G473, the cranial, cervical, thoracic and lumbosacral regions are separate segments. The professional component is G473 (J104).

Billing rules

• Not payable with G455 or G466 for the same patient the same day (J104).
• 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).
• 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

• G473 Schedule C professional component (J104).

Common rejections

• ADH: OHIP describes this as 'Cannot be billed together': G471 can't be paid with G455 or G466 for the same patient the same day (J104).

Related codes: G473, G455, G466, G456, G458

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Physical Medicine, Needle Electromyography and Nerve Conduction Studies, page J104. Rules GP11.

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