ICD-10 Code B01.81 – Varicella keratitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B01.81 – Varicella keratitis
What it is
B01.81 identifies keratitis caused by varicella infection, meaning inflammation of the cornea linked to chickenpox or varicella-zoster involvement. Use it when the record specifically documents varicella keratitis.
Clinical signs
Clinical features may include eye pain, redness, tearing, photophobia, and decreased vision. Corneal inflammation or epithelial defects may be noted; clinical features vary, so refer to documentation.
When to use this code
Use this code when the clinician documents keratitis due to varicella infection, including an ocular complication of chickenpox. It is appropriate when the diagnosis is stated clearly in the chart, discharge summary, or specialist note. If the record only says “eye infection” or “conjunctivitis,” check documentation before assigning B01.81.
Do not use for
Do not use it for nonspecific keratitis, conjunctivitis, or corneal irritation without a documented varicella cause. If the etiology is unclear, check documentation.
Coding tip
Confirm that varicella is the documented cause of the corneal disease before coding B01.81.