ICD-10 Code H40.84 – Neovascular secondary angle closure glaucoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.84 – Neovascular secondary angle closure glaucoma
What it is
Use this code for glaucoma caused by new, abnormal blood vessels that close the anterior chamber angle. The blockage raises intraocular pressure and can damage the optic nerve.
Clinical signs
Common findings include iris or angle neovascularization, elevated eye pressure, pain, redness, blurred vision, and progressive optic nerve damage. Clinical features vary; refer to documentation.
When to use this code
Assign this code when the provider documents neovascular secondary angle closure glaucoma, including rubeotic glaucoma or angle closure from neovascularization. Use it when the record clearly identifies the glaucoma type and cause. Check documentation if the note only says glaucoma or ocular ischemia.
Do not use for
Do not use this code for primary angle-closure glaucoma, open-angle glaucoma, or unspecified glaucoma. Do not use it if neovascularization is absent or not documented.
Coding tip
Query the provider when the chart mentions iris neovascularization, rubeosis, or secondary glaucoma but does not explicitly link them.