ICD-10 Code H20.12 – Chronic iridocyclitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.12 – Chronic iridocyclitis, left eye
What it is
H20.12 identifies chronic inflammation of the iris and ciliary body in the left eye. Use it when the record clearly documents a long-standing iridocyclitis affecting that eye.
Clinical signs
Typical findings may include eye pain, redness, photophobia, blurred vision, and a small or irregular pupil. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents chronic iridocyclitis, anterior uveitis, or chronic iritis limited to the left eye. It also fits follow-up visits when the condition remains active or is still being monitored. If laterality is not stated, check documentation.
Do not use for
Do not use H20.12 for acute iridocyclitis, right eye disease, or bilateral involvement. If the note describes another uveitis subtype or does not specify chronicity, check documentation.
Coding tip
Confirm both chronicity and left-eye laterality before assigning H20.12.