ICD-10 Code H20 – Iridocyclitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20 – Iridocyclitis
What it is
H20 identifies inflammation of the iris and ciliary body, the front part of the uvea. Use it when documentation states iridocyclitis or anterior uveitis.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Clinical features vary; refer to documentation for laterality and whether the episode is acute or chronic.
When to use this code
Use H20 when the provider documents iridocyclitis or anterior uveitis without a more specific subtype. It may also fit when the record confirms inflammation limited to the iris and ciliary body. Check documentation for any specified cause, laterality, or associated systemic disease.
Do not use for
Do not use H20 for conjunctivitis, keratitis, or posterior uveitis. If the note names a different ocular inflammation, code that condition instead.
Coding tip
Review the ophthalmology note for laterality and acuity, and code the most specific documented diagnosis.