ICD-10 Code H21.50 – Unspecified adhesions of iris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H21.50 – Unspecified adhesions of iris
What it is
H21.50 identifies adhesions involving the iris when the documentation does not specify the type or cause. Use it for recorded iris sticking or synechiae without more detail.
Clinical signs
Findings may include an irregular pupil, limited iris movement, or evidence of the iris being attached to nearby structures. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents unspecified iris adhesions, iris synechiae, or similar wording without further characterization. It also fits when the record confirms adhesions but does not identify anterior or posterior involvement. Do not assume a more specific code unless the note clearly supports it.
Do not use for
Do not use H21.50 if the chart specifies a different iris disorder or a more exact adhesion type. Check documentation when the record describes postoperative findings, inflammation, or other eye complications instead of isolated iris adhesions.
Coding tip
Choose the most specific iris adhesion code only when the provider clearly documents the exact type or location.