ICD-10 Code H21.253 – Iridoschisis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
The ICD-10 code for Iridoschisis, bilateral is H21.253.
2026 ICD-10-CM Diagnosis Code H21.253 – Iridoschisis, bilateral
2026 ICD-10-CM Diagnosis Code H21.253 – Iridoschisis, bilateral
What it is
Iridoschisis is a rare eye disorder in which the iris stroma splits into layers. Bilateral means it affects both eyes.
Clinical signs
Findings may include a split or shredded-looking iris, often with loose anterior stromal fibers. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents iridoschisis in both eyes. It may appear in ophthalmology notes, slit-lamp findings, or problem lists. If laterality is not stated, check documentation before coding.
Do not use for
Do not use it for other iris disorders, such as iritis or iris atrophy, unless iridoschisis is specifically documented. Do not assume bilateral involvement from a unilateral note.
Coding tip
Code only when the diagnosis and bilateral laterality are clearly documented by the clinician.