ICD-10 Code H21.539 – Iridodialysis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.539 – Iridodialysis, unspecified eye
What it is
Iridodialysis is a tear or separation of the iris from its attachment near the eye’s ciliary body. This code identifies the condition when the affected eye is not specified in the record.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include a visible iris defect, irregular pupil shape, or symptoms after eye trauma. Diagnosis is usually confirmed by ophthalmic examination.
When to use this code
Use H21.539 when the provider documents iridodialysis but does not identify left or right eye. It also fits records describing an iris root separation without laterality. If the note names the eye, use the laterality-specific code instead.
Do not use for
Do not use this code for other iris disorders, such as inflammation, cysts, or coloboma. Do not assign it when the record clearly specifies the right or left eye.
Coding tip
Check the ophthalmology note for laterality before assigning the unspecified-eye code.