ICD-10 Code H21.501 – Unspecified adhesions of iris, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.501 – Unspecified adhesions of iris, right eye
What it is
This code identifies adhesions involving the iris in the right eye when the type is not further specified. It signals an abnormal sticking of iris tissue that may affect normal eye anatomy.
Clinical signs
Clinical features vary; refer to documentation. Findings may include iris adhesion noted on eye examination, abnormal pupil shape, or other slit-lamp abnormalities affecting the right eye.
When to use this code
Use this code when the provider documents adhesions of the iris in the right eye but does not specify the exact type or cause. It is appropriate when the record clearly identifies the right eye and only “unspecified adhesions” is documented. Check documentation if laterality or the adhesion type is unclear.
Do not use for
Do not use this code if the record specifies a different iris adhesion diagnosis, another eye, or a more detailed condition. If the documentation is incomplete, check documentation rather than assuming H21.501.
Coding tip
Verify laterality carefully; H21.501 is for the right eye only.