ICD-10 Code B05.81 – Measles keratitis and keratoconjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B05.81 – Measles keratitis and keratoconjunctivitis
What it is
This code identifies keratitis and keratoconjunctivitis caused by measles infection. Use it when the chart documents ocular involvement as part of measles.
Clinical signs
Findings may include conjunctival inflammation, corneal involvement, eye redness, tearing, photophobia, or blurred vision. Clinical features vary; refer to documentation.
When to use this code
Use B05.81 when the provider documents measles with keratitis, keratoconjunctivitis, or both. It applies when the eye condition is specifically linked to measles rather than another infection or nonspecific conjunctivitis. Check documentation if the cause is unclear.
Do not use for
Do not use this code for measles without ocular involvement or for eye disease from another cause. If the record does not clearly connect the eye findings to measles, check documentation.
Coding tip
Capture the measles diagnosis first, then code B05.81 only when the ocular complication is explicitly documented.