ICD-10 Code H20.012 – Primary iridocyclitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.012 – Primary iridocyclitis, left eye
What it is
H20.012 identifies primary inflammation of the iris and ciliary body in the left eye. Use it when the record specifically documents iridocyclitis affecting only the left eye.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. You may also see a miotic pupil or cells and flare in the anterior chamber; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider documents primary iridocyclitis limited to the left eye. It is appropriate for outpatient, inpatient, or specialist notes that clearly identify laterality. If the note only says uveitis or iritis without laterality, check documentation before assigning H20.012.
Do not use for
Do not use this code for right eye, bilateral disease, or unspecified eye involvement. Also avoid it if the inflammation is described as secondary, traumatic, or due to another underlying condition.
Coding tip
Verify both laterality and that the condition is primary before coding H20.012.