ICD-10 Code H20.013 – Primary iridocyclitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.013 – Primary iridocyclitis, bilateral
What it is
H20.013 identifies primary iridocyclitis affecting both eyes. It refers to inflammation of the iris and ciliary body when no secondary cause is documented.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. You may also see a constricted pupil or cells and flare in the anterior chamber; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents primary iridocyclitis in both eyes, or bilateral anterior uveitis without an identified underlying cause. It also fits follow-up visits when the same bilateral diagnosis remains active and is still being managed.
Confirm laterality in the note before assigning it. If the record names an associated systemic disease, trauma, infection, or other cause, code the documented condition instead or in addition, as directed by the chart.
Do not use for
Do not use H20.013 for unilateral iridocyclitis, unspecified uveitis, or secondary iridocyclitis with a documented cause. Check documentation if the provider uses only “iritis” without laterality.
Coding tip
Always verify bilateral involvement and whether the inflammation is primary or secondary before coding.