ICD-10 Code H20.9 – Unspecified iridocyclitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.9 – Unspecified iridocyclitis
What it is
H20.9 identifies iridocyclitis, an inflammation involving the iris and ciliary body, when the record does not specify a cause or a more precise type. Use it when documentation confirms anterior uveitis but remains nonspecific.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Clinical features vary; refer to documentation for laterality, acuity, and whether the episode is acute, chronic, or recurrent.
When to use this code
Use H20.9 when the provider documents iridocyclitis, anterior uveitis, or inflammatory disease of the iris/ciliary body without further detail. It also fits when the chart lacks an identified trigger, subtype, or laterality. If the note names a specific cause or form, code that diagnosis instead.
Do not use for
Do not use this code for glaucoma, conjunctivitis, keratitis, or posterior uveitis. If the documentation supports a more specific iridocyclitis code or an underlying systemic disorder, choose the documented condition instead.
Coding tip
Query for laterality, acuity, and cause when the chart only says “uveitis” or “iritis.”