ICD-10 Code H26.21 – Cataract with neovascularization (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H26.21 – Cataract with neovascularization
What it is
This code identifies a cataract complicated by neovascularization, meaning abnormal new blood vessels are present in or around the eye with the lens opacity. It signals a more complex cataract diagnosis than routine age-related lens clouding.
Clinical signs
Documentation may note reduced vision, lens opacity, and visible or reported neovascular changes in the eye. Clinical features vary; refer to documentation.
When to use this code
Use H26.21 when the provider documents cataract with neovascularization as the diagnosis. Apply it when the record clearly links the cataract to abnormal vessel growth, such as in ophthalmology assessments or follow-up notes. Check documentation if the neovascularization is mentioned without a confirmed cataract.
Do not use for
Do not use this code for uncomplicated cataract, or for neovascularization without documented cataract. If the record only says “eye neovascularization” or the cause is unclear, check documentation.
Coding tip
Code only when both cataract and neovascularization are explicitly documented together in the same clinical context.