ICD-10 Code H20.019 – Primary iridocyclitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.019 – Primary iridocyclitis, unspecified eye
What it is
H20.019 identifies primary iridocyclitis affecting an unspecified eye. It refers to inflammation of the iris and ciliary body when the affected side is not documented.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Clinical features vary; refer to documentation, and confirm that the provider describes iridocyclitis rather than another anterior uveitis type.
When to use this code
Use this code when the record states primary iridocyclitis and does not specify right or left eye. It is also appropriate when the provider documents anterior uveitis with this diagnosis and laterality remains unspecified. Check documentation if the note names a different uveitis subtype.
Do not use for
Do not use it when the record specifies the right or left eye, because laterality-specific codes apply. Do not assign it for non-inflammatory eye pain, conjunctivitis, or other documented ocular conditions.
Coding tip
If laterality is missing, code the unspecified-eye option only after reviewing the full note for a documented side.