ICD-10 Code H20.00 – Unspecified acute and subacute iridocyclitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.00 – Unspecified acute and subacute iridocyclitis
What it is
H20.00 identifies acute or subacute inflammation of the iris and ciliary body when the record does not specify a more exact type. Use it for anterior uveitis documented as unspecified acute or subacute iridocyclitis.
Clinical signs
Typical findings include eye pain, redness, photophobia, and blurred vision. Clinical features vary; refer to documentation for laterality, severity, and whether the episode is acute or subacute.
When to use this code
Use this code when the provider documents acute or subacute iridocyclitis but does not identify a specific cause or subtype. It also fits when the chart supports anterior uveitis and no more precise ICD-10-CM option is recorded. Check documentation if the note mentions recurrent, chronic, or infectious disease.
Do not use for
Do not use H20.00 for chronic, recurrent, or specified iridocyclitis, or when the provider names a different uveitis subtype. Do not assign it if documentation supports a more specific code.
Coding tip
Review the ophthalmology note for acuity and specificity before defaulting to H20.00.