ICD-10 Code H40.842 – Neovascular secondary angle closure glaucoma, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.842 – Neovascular secondary angle closure glaucoma, left eye
What it is
This code identifies neovascular secondary angle closure glaucoma affecting the left eye. It means abnormal new blood vessels have caused or contributed to closure of the drainage angle, raising eye pressure.
Clinical signs
Typical findings include elevated intraocular pressure, a closed or narrowing angle, and visible iris or angle neovascularization. Clinical features vary; refer to documentation.
When to use this code
Use this code when documentation states neovascular glaucoma in the left eye with angle closure, or describes secondary angle closure due to ocular neovascularization. You should confirm laterality and that the left eye is specifically identified. If the record only says neovascular glaucoma without angle closure, check documentation.
Do not use for
Do not use this code for glaucoma in the right eye, bilateral disease, or unspecified eye. It is also not appropriate for primary angle closure glaucoma without a neovascular cause.
Coding tip
Verify both laterality and the secondary neovascular cause before assigning H40.842.