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Billing code

G234A — Percutaneous Cervical Sympathetic Nerve Block Or Stellate Ganglion Block - Without Ultrasound Or Fluoroscopic Guidance, Unilateral

Stellate ganglion block, no imaging

Bill G234 for a cervical sympathetic or stellate ganglion block on one side, without ultrasound or fluoroscopic guidance.

Watch for: Not payable with G920 the same day; G920 and G234 total up to 24 per 12 months without Ministry authorization.

Code

G234A

Description

Percutaneous Cervical Sympathetic Nerve Block Or Stellate Ganglion Block - Without Ultrasound Or Fluoroscopic Guidance, Unilateral

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

Cervical sympathetic or stellate ganglion block on one side, done without ultrasound or fluoroscopic guidance.

What it covers

G234 is a percutaneous cervical sympathetic nerve block or stellate ganglion block without ultrasound or fluoroscopic guidance, one side (J78). With image guidance, bill G920.

Billing rules

• G920 and G234 are each limited to one unilateral or one bilateral procedure per patient per day, up to 24 services per patient per 12 months for any mix of unilateral and bilateral; for more, get written prior authorization from the Ministry (J78).
• Not payable with G920 for the same patient on the same day (J78).
• Same patient, same day as other nerve blocks or injections only if it diagnoses or treats a separate condition (J78).
• A sympathetic block that results from an epidural, spinal, plexus or peripheral nerve block is not billable as G920, G234 or G236 (J78).
• Fees for obtaining or interpreting guidance images (professional or technical) are not payable on top of these injections (J74).
• The chart must describe the procedure (or, with image guidance, keep images of final needle placement showing the site and/or contrast spread) and, for a diagnostic injection, its purpose and whether the response was positive or negative (J74).

Often billed with

• E445 when alcohol or other sclerosing solutions are used (J78).

Common rejections

• ADH: OHIP describes this as 'Cannot be billed together': G234 and G920 were billed for the same patient on the same day (J78).

Related codes: G920, G236, E445, G233, G232

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Nerve Blocks - Interventional Pain Injections, page J78.

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