ICD-10 Code H21.1X1 – Other vascular disorders of iris and ciliary body, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.1X1 – Other vascular disorders of iris and ciliary body, right eye
What it is
This code identifies a vascular disorder affecting the iris and ciliary body in the right eye. Use it when documentation specifies an abnormal blood vessel condition in these structures, but not a more specific named diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Findings may include visible abnormal iris vessels, anterior segment changes, or ophthalmology notes describing vascular involvement of the right iris or ciliary body.
When to use this code
Use H21.1X1 when the provider documents a vascular disorder of the iris or ciliary body limited to the right eye. It is appropriate when the record does not identify a more specific condition or a different eye.
Code from the ophthalmology assessment, operative note, or problem list when laterality is clearly stated. If the documentation is vague or only says “vascular disorder,” check documentation before assigning this code.
Do not use for
Do not use this code for left eye, bilateral, or unspecified eye involvement. Do not use it when the record describes a different iris or ciliary body disorder without vascular involvement.
Coding tip
Confirm laterality in the note; H21.1X1 is specific to the right eye.