ICD-10 Code H21.25 – Iridoschisis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.25 – Iridoschisis
What it is
Iridoschisis is a rare eye disorder in which the iris stroma splits into layers. It usually affects older adults and may be found during an eye exam.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include a split or shredded-looking iris, floating anterior iris fibers, and possible iris atrophy or pupil distortion.
When to use this code
Use H21.25 when the provider documents iridoschisis as the confirmed diagnosis. Apply it for charted slit-lamp findings or ophthalmology assessments that specifically name this condition. If the note only describes an abnormal iris without naming iridoschisis, check documentation.
Do not use for
Do not use this code for other iris disorders, traumatic iris injury, or nonspecific “iris abnormality” without confirmation. Check documentation if the condition is described differently.
Coding tip
Code the exact documented term “iridoschisis” rather than a broader iris finding.