ICD-10 Code H10.01 – Acute follicular conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.01 – Acute follicular conjunctivitis
What it is
H10.01 identifies acute follicular conjunctivitis, an acute inflammation of the conjunctiva with follicle formation. You use it when the record specifically documents this type of conjunctivitis.
Clinical signs
Typical findings include red eye, irritation, tearing, and conjunctival follicles on exam. Clinical features vary; refer to documentation.
When to use this code
Use H10.01 when the provider documents acute follicular conjunctivitis as the diagnosis. It fits outpatient or emergency records describing an acute conjunctival infection or inflammation with follicular changes. If the chart only says “conjunctivitis” without subtype, check documentation.
Do not use for
Do not use this code for chronic conjunctivitis, allergic conjunctivitis, or other specified conjunctival disorders. If the subtype is not confirmed, check documentation.
Coding tip
Assign the code only when follicular conjunctivitis is clearly documented, not inferred from nonspecific eye redness.