ICD-10 Code H40.222 – Chronic angle-closure glaucoma, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.222 – Chronic angle-closure glaucoma, left eye
What it is
This code identifies chronic angle-closure glaucoma affecting the left eye. It means the eye’s drainage angle is persistently narrowed or closed, which can raise intraocular pressure and damage the optic nerve over time.
Clinical signs
Typical findings include a chronically shallow anterior chamber, elevated or intermittently elevated eye pressure, and optic nerve or visual field changes consistent with glaucoma. Clinical features vary; refer to documentation.
When to use this code
Use H40.222 when the provider documents chronic angle-closure glaucoma in the left eye specifically. It is appropriate when the record supports a chronic, not acute, angle-closure process and laterality is clearly stated. Check documentation if both eyes are involved or the type is unspecified.
Do not use for
Do not use this code for acute angle-closure glaucoma, primary open-angle glaucoma, or glaucoma without left-eye laterality. If the chart does not clearly support chronic angle closure, check documentation.
Coding tip
Confirm chronicity and laterality in the ophthalmology note before assigning H40.222.