ICD-10 Code H20.03 – Secondary Infectious Iridocyclitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.03 – Secondary infectious iridocyclitis
What it is
Secondary infectious iridocyclitis is inflammation of the iris and ciliary body that occurs because of an underlying infection. Use this code when the record clearly links the eye inflammation to an infectious cause.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Clinical features vary; refer to documentation for the specific infectious source and laterality if recorded.
When to use this code
Use H20.03 when the clinician documents iridocyclitis as secondary to infection, such as when the note states an infectious organism or infectious process is the cause. Apply it only when the diagnosis is explicit, not merely suspected.
If the chart says uveitis, iritis, or anterior uveitis without an infectious link, check documentation before assigning this code. You should code the infectious eye inflammation only when the relationship is clearly stated.
Do not use for
Do not use this code for noninfectious iridocyclitis, autoimmune uveitis, or unspecified anterior uveitis. Check documentation if the cause is not clearly infectious.
Coding tip
Look for wording that connects the eye inflammation to infection; without that link, this code may be incorrect.