ICD-10 Code H10.43 – Chronic follicular conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.43 – Chronic follicular conjunctivitis
What it is
Use this code for a long-lasting conjunctival inflammation marked by follicles on the inner eyelid or conjunctiva. It describes a chronic eye surface condition, not a specific cause.
Clinical signs
Typical findings include persistent conjunctival redness, follicular bumps, irritation, and tearing. Clinical features vary; refer to documentation.
When to use this code
Assign H10.43 when the provider documents chronic follicular conjunctivitis and does not identify a more specific cause. Use it for ongoing conjunctival inflammation with follicle formation that is clearly described as chronic. Check documentation if the record mentions infection, allergy, or another named conjunctivitis.
Do not use for
Do not use it for acute conjunctivitis or for conjunctivitis with a documented specific etiology that has its own code. Check documentation when the diagnosis is nonspecific or mixed.
Coding tip
Look for the word “chronic” and confirm follicular findings before assigning H10.43.