ICD-10 Code H40.849 – Neovascular Secondary Angle Closure Glaucoma, Unspecified Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.849 – Neovascular secondary angle closure glaucoma, unspecified eye
What it is
This code identifies neovascular glaucoma causing secondary angle closure in an unspecified eye. It means abnormal new blood vessels have led to blocked aqueous outflow and increased eye pressure.
Clinical signs
Typical findings include iris or angle neovascularization, elevated intraocular pressure, eye pain, redness, and reduced vision. Clinical features vary; refer to documentation.
When to use this code
Use H40.849 when the record documents neovascular secondary angle closure glaucoma but does not specify the right or left eye. It also fits when the provider states the condition clearly and laterality is not recorded. Check documentation if the note only mentions glaucoma without confirming the neovascular secondary angle closure type.
Do not use for
Do not use this code for primary angle-closure glaucoma or other secondary glaucomas without neovascularization. If the affected eye is specified, code the laterality-specific option instead.
Coding tip
Confirm both the neovascular cause and the unspecified eye before assigning H40.849.