ICD-10 Code H40.232 – Intermittent Angle-Closure Glaucoma, Left Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.232 – Intermittent angle-closure glaucoma, left eye
What it is
This code identifies intermittent angle-closure glaucoma affecting the left eye. It means the drainage angle closes in episodes, causing temporary pressure buildup and risk of optic nerve damage.
Clinical signs
Findings may include intermittent eye pain, blurred vision, halos around lights, headache, or nausea during attacks. Clinical features vary; refer to documentation for angle closure and left-eye involvement.
When to use this code
Use H40.232 when the record documents intermittent or episodic angle-closure glaucoma in the left eye. You may also use it when the clinician specifies recurrent angle closure with no evidence that the condition is acute, chronic, or unspecified.
Confirm laterality and glaucoma type in the note before coding. If the documentation only says “glaucoma” or does not identify the left eye, check documentation.
Do not use for
Do not use this code for open-angle glaucoma, acute angle-closure glaucoma, or chronic angle-closure glaucoma. Do not assign it if the eye laterality is not documented.
Coding tip
Match the exact glaucoma subtype and laterality in the provider note; if the episode pattern is unclear, check documentation before assigning H40.232.