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Billing code

G473A — EMG/nerve conduction Schedule C (complex) – professional component

Complex EMG/nerve study, interpretation

Bill G473 for complex electrodiagnostic testing with 10 or more studies and at least 60 minutes of your direct involvement.

Watch for: Record start and stop times in the chart or it isn't payable; not payable with G456 or G457 the same day.

Code

G473A

Description

EMG/nerve conduction Schedule C (complex) – professional component

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

Professional fee for complex electrodiagnostic testing (Schedule C): 10+ studies and at least 60 minutes of your direct involvement.

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).

G473 is billed when you perform the EMG and/or perform or supervise the nerve conduction studies and interpret the results. The technical component is G471 (J104).

Billing rules

• Needs at least 60 minutes of your direct involvement in the service, to the exclusion of all other work (J104).
• Record start and stop times in the chart, or it is not payable; see GP7 and GP55 for time keeping (J104).
• Not payable with G456 or G457 for the same patient the same day (J104).
• G458 single fibre EMG can be added only if its time is not counted toward the 60-minute minimum (J104).
• 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).
• Schedules A, B, C and single fibre EMG require an intramuscular needle recording electrode. Surface EMG and other EMG techniques are not payable (J103).

Often billed with

• G471 Schedule C technical component (J104).
• G458 single fibre EMG, with its time kept separate (J104).

Common rejections

• ADH: OHIP describes this as 'Cannot be billed together': G473 can't be paid with G456 or G457 for the same patient the same day (J104).

Related codes: G471, G456, G457, G458, G455

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

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