ICD-10 Code H40.223 – Chronic angle-closure glaucoma, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.223 – Chronic angle-closure glaucoma, bilateral
What it is
H40.223 identifies chronic angle-closure glaucoma affecting both eyes. It describes a long-term form of glaucoma where the drainage angle is narrowed or blocked, leading to impaired aqueous outflow and progressive optic nerve damage.
Clinical signs
Findings may include elevated intraocular pressure, optic disc cupping, and visual field loss. Clinical features vary; refer to documentation for bilateral chronic angle-closure disease or confirmed glaucoma assessment.
When to use this code
Use H40.223 when the record clearly documents chronic angle-closure glaucoma in both eyes. It is appropriate when the provider specifies bilateral involvement, even if the note also mentions prior angle closure or ongoing ophthalmology follow-up.
Do not assume laterality from a unilateral diagnosis or from nonspecific glaucoma wording. Check documentation if the record only states glaucoma, suspect glaucoma, or an acute angle-closure episode without chronic bilateral confirmation.
Do not use for
Do not use this code for primary open-angle glaucoma, acute angle-closure glaucoma, or glaucoma suspect. Do not assign it when bilateral chronic angle-closure glaucoma is not explicitly documented.
Coding tip
Verify both the chronic nature and bilateral laterality in the ophthalmology note before assigning H40.223.