ICD-10 Code H21.1X2 – Other vascular disorders of iris and ciliary body, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.1X2 – Other vascular disorders of iris and ciliary body, left eye
What it is
This code identifies a vascular disorder affecting the iris and ciliary body in the left eye. Use it when the record specifies abnormal blood vessel changes in these structures and laterality is documented.
Clinical signs
Findings may include visible abnormal vessels, iris or ciliary body vascular changes, or related anterior segment abnormalities on eye examination. Clinical features vary; refer to documentation.
When to use this code
Use H21.1X2 when the clinician documents an other vascular disorder of the iris or ciliary body in the left eye. This is appropriate for charted diagnoses involving the left anterior segment, not just suspected eye disease. If laterality is missing, check documentation before coding.
Do not use for
Do not use this code for vascular disorders of the right eye, bilateral disease, or conditions limited to other eye structures. Do not apply it when the note does not clearly identify the iris or ciliary body.
Coding tip
Confirm both the anatomic site and left-eye laterality in the provider note before assigning H21.1X2.