ICD-10 Code H20.10 – Chronic iridocyclitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.10 – Chronic iridocyclitis, unspecified eye
What it is
H20.10 identifies chronic inflammation of the iris and ciliary body in an unspecified eye. Use it when the record documents iridocyclitis as ongoing or chronic, but does not name the right or left eye.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Exam may show anterior chamber inflammation, but clinical features vary; refer to documentation.
When to use this code
Use H20.10 when the provider documents chronic iridocyclitis and does not specify laterality. It also fits follow-up notes that continue to describe the same chronic condition without a more precise eye designation. If the chart later identifies the affected eye, code to that specific laterality instead.
Do not use for
Do not use this code for acute iridocyclitis, uveitis without iris/ciliary body involvement, or a condition limited to a specified eye when laterality is documented. Check documentation.
Coding tip
Always verify whether the note states right, left, or bilateral involvement before defaulting to unspecified eye.