ICD-10 Code A74.0 – Chlamydial Conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A74.0 – Chlamydial conjunctivitis
What it is
A74.0 identifies conjunctivitis caused by Chlamydia infection. Use it when documentation states chlamydial eye infection, inclusion conjunctivitis, or similar wording.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include conjunctival redness, discharge, and irritation, but you should code only when chlamydial conjunctivitis is documented or clearly supported.
When to use this code
Use A74.0 when the provider diagnoses conjunctivitis due to Chlamydia, including adult inclusion conjunctivitis or neonatal chlamydial eye infection if documented that way. You may also use it when records clearly link conjunctivitis to a chlamydial infection elsewhere. Check documentation for laterality or associated infection details.
Do not use for
Do not use this code for nonspecific bacterial, viral, allergic, or irritative conjunctivitis. If the record does not specify Chlamydia as the cause, check documentation before assigning A74.0.
Coding tip
Look for explicit provider wording that connects conjunctivitis to Chlamydia; do not infer the cause from testing alone.