ICD-10 Code H21.1X – Other vascular disorders of iris and ciliary body (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.1X – Other vascular disorders of iris and ciliary body
What it is
This code identifies vascular abnormalities affecting the iris and ciliary body that do not fit a more specific diagnosis. Use it when documentation describes an “other” vascular disorder in these anterior uveal structures.
Clinical signs
Findings may include visible abnormal vessels, iris or ciliary body vascular congestion, or bleeding related to the lesion. Clinical features vary; refer to documentation.
When to use this code
Use H21.1X when the provider documents a vascular disorder of the iris or ciliary body and no more specific ICD-10-CM code applies. It is appropriate for charted anterior segment vascular lesions, including unspecified or otherwise classified conditions. Check documentation if the note is vague.
Do not use for
Do not use this code for generalized eye inflammation, retinal vascular disease, or trauma-related bleeding unless the provider specifically links the finding to the iris or ciliary body. Do not substitute it for a more specific diagnosis.
Coding tip
Look for the exact anatomic site and whether the condition is described as other, unspecified, or more specific before assigning H21.1X.