ICD-10 Code H10.439 – Chronic follicular conjunctivitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.439 – Chronic follicular conjunctivitis, unspecified eye
What it is
This code identifies long-lasting follicular inflammation of the conjunctiva affecting an unspecified eye. Use it when the record documents chronic follicular conjunctivitis but does not specify right or left.
Clinical signs
Typical findings include conjunctival follicles, redness, irritation, and chronic or recurrent eye discomfort. Clinical features vary; refer to documentation.
When to use this code
Use H10.439 when the provider documents chronic follicular conjunctivitis and the affected eye is not identified. It also fits follow-up visits for a persistent follicular conjunctival process when laterality is absent. Check documentation if the note is vague or uses another conjunctivitis type.
Do not use for
Do not use this code for acute conjunctivitis, allergic conjunctivitis, or other specified conjunctival disorders. Do not assign it when the record clearly states right or left eye.
Coding tip
Always confirm chronicity and laterality in the note before assigning H10.439.