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Billing code

G813A — Corneal Pachymetry - Professional Component

Corneal thickness for glaucoma risk

Bill G813 for measuring corneal thickness to identify patients at risk for glaucoma.

Watch for: Limited to once per patient per lifetime, and not insured for any purpose other than glaucoma risk.

Code

G813A

Description

Corneal Pachymetry - 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

Measurement of corneal thickness to identify patients at risk for glaucoma. Once per patient per lifetime.

What it covers

Corneal pachymetry is measurement of corneal thickness by any method to identify patients at risk for glaucoma, based on a suspicious optic nerve and/or visual field test, raised intraocular pressure and/or family history (J92).

Billing rules

• Limited to 1 per patient per lifetime. Extra services are not insured (J92).
• Pachymetry for any purpose other than identifying patients at risk for glaucoma is not insured (J92).
• Professional component only is listed (J92).

Often billed with

• G820 glaucoma OCT and visual fields G858/G432 (J91, J93).

Common rejections

• AM1: Service limit exceeded: corneal pachymetry is limited to once per patient per lifetime (J92).

Related codes: G820, G435, G858, G432, G811

Source: Schedule of Benefits (July 1, 2026), Diagnostic and Therapeutic Procedures, Ophthalmology, page J92.

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