ICD-10 Code H40.843 – Neovascular secondary angle closure glaucoma, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.843 – Neovascular secondary angle closure glaucoma, bilateral
What it is
This code identifies neovascular glaucoma affecting both eyes, where abnormal new blood vessels cause or contribute to angle closure and raised eye pressure. It is a secondary glaucoma, meaning another eye condition is the underlying driver.
Clinical signs
Typical findings include iris or angle neovascularization, elevated intraocular pressure, and signs of angle closure on eye examination. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents bilateral neovascular secondary angle closure glaucoma. It fits cases where both eyes are affected and the provider links the glaucoma to neovascularization. Check documentation if laterality or the type of secondary glaucoma is unclear.
Do not use for
Do not use it for primary angle-closure glaucoma, unilateral neovascular glaucoma, or unspecified glaucoma. If the chart only mentions ocular hypertension or retinal neovascularization without glaucoma, this code is not appropriate.
Coding tip
Confirm both laterality and the secondary neovascular cause in the assessment before assigning H40.843.