ICD-10 Code H20.039 – Secondary infectious iridocyclitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.039 – Secondary infectious iridocyclitis, unspecified eye
What it is
This code identifies iridocyclitis, an inflammation of the iris and ciliary body, when it is secondary to an infectious cause and the eye is not specified. Use it when the record documents infectious uveitis involving the anterior segment.
Clinical signs
Typical findings include eye pain, redness, photophobia, tearing, and blurred vision. Clinical features vary; refer to documentation for signs of anterior uveitis or any linked infection.
When to use this code
Use H20.039 when the clinician documents secondary infectious iridocyclitis and does not identify the affected eye. It is appropriate when the note links the inflammation to an infectious process and no more specific laterality is available.
If the provider names the right or left eye, choose the laterality-specific code instead. Check documentation when the cause is unclear or when the record describes a different type of uveitis.
Do not use for
Do not use this code for noninfectious iritis, primary uveitis, or unspecified eye inflammation without an infectious cause. Check documentation if the chart only says conjunctivitis or keratitis.
Coding tip
Always confirm both the infectious etiology and the absence of laterality before assigning H20.039.