ICD-10 Code H20.011 – Primary iridocyclitis, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.011 – Primary iridocyclitis, right eye
What it is
Use this code for primary inflammation of the iris and ciliary body in the right eye. It identifies an anterior uveitis process limited to the right eye, not a generalized or bilateral condition.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Clinical features vary; refer to documentation for slit-lamp findings such as anterior chamber inflammation.
When to use this code
Assign H20.011 when the provider documents primary iridocyclitis or primary anterior uveitis affecting only the right eye. Use it when laterality is clearly stated and no secondary cause is documented.
If the note describes recurrent, chronic, or secondary uveitis, check documentation before coding. Do not assume laterality from symptoms alone.
Do not use for
Do not use this code for left eye, bilateral disease, or unspecified eye involvement. It is also not appropriate when the inflammation is documented as secondary to another condition.
Coding tip
Confirm both laterality and whether the iridocyclitis is primary versus secondary before assigning H20.011.