ICD-10 Code H40.229 – Chronic angle-closure glaucoma, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.229 – Chronic angle-closure glaucoma, unspecified eye
What it is
This code identifies chronic angle-closure glaucoma when the affected eye is not specified. It refers to a long-term form of glaucoma in which drainage of aqueous humor is blocked by a narrowed or closed anterior chamber angle.
Clinical signs
Findings may include elevated intraocular pressure, optic nerve damage, and visual field loss. Clinical features vary; refer to documentation for laterality, severity, and exam findings.
When to use this code
Use H40.229 when the record documents chronic angle-closure glaucoma but does not identify the eye involved. This is appropriate for outpatient, inpatient, or specialist notes when laterality is missing or not stated. Check documentation if the provider specifies a different glaucoma type or eye.
Do not use for
Do not use this code for acute angle-closure glaucoma, primary open-angle glaucoma, or other specified glaucoma types. Also avoid it when the affected eye is documented and a more specific code is available.
Coding tip
If the note lacks laterality, code the unspecified-eye option only after confirming no further detail is documented.