ICD-10 Code H40.233 – Intermittent angle-closure glaucoma, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.233 – Intermittent angle-closure glaucoma, bilateral
What it is
This code identifies intermittent angle-closure glaucoma affecting both eyes. It describes episodes where the drainage angle narrows or closes temporarily, causing pressure-related eye problems.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include episodic eye pain, blurred vision, halos, headache, or nausea, with evidence of angle closure on eye examination.
When to use this code
Use H40.233 when the provider documents intermittent angle-closure glaucoma in both eyes. Apply it for confirmed bilateral disease, even if symptoms come and go between episodes.
Choose this code when the record clearly states bilateral involvement and does not describe a different glaucoma type. Check documentation if the note only mentions “suspected” angle closure.
Do not use for
Do not use this code for open-angle glaucoma, acute angle-closure glaucoma, or unilateral disease. Check documentation if the eye laterality or glaucoma subtype is unclear.
Coding tip
Verify both the intermittent nature and bilateral laterality in the provider note before assigning H40.233.