ICD-10 Code B00.53 – Herpesviral Conjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B00.53 – Herpesviral conjunctivitis
What it is
B00.53 identifies conjunctivitis caused by herpes simplex virus. Use it when the chart documents herpesviral infection affecting the conjunctiva, often with eye redness and irritation.
Clinical signs
Clinical features may include conjunctival injection, tearing, irritation, and a unilateral red eye. If documentation is unclear, check whether the provider specifically identifies herpesviral conjunctivitis.
When to use this code
Use B00.53 when the clinician diagnoses herpes simplex conjunctivitis or documents herpesvirus involvement of the conjunctiva. It is appropriate for confirmed cases and for follow-up visits when the condition remains active. If the record only says “eye infection,” you need more specific documentation.
Do not use for
Do not use this code for nonspecific conjunctivitis, keratitis without conjunctival involvement, or other eye infections. Check documentation if the herpes diagnosis is not explicitly linked to the conjunctiva.
Coding tip
Assign B00.53 only when the provider clearly documents herpesviral conjunctivitis; otherwise, query for specificity.