ICD-10 Code B60.2 – Naegleriasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B60.2 – Naegleriasis
What it is
Use this code for Naegleriasis, a rare brain infection caused by Naegleria fowleri. It is a severe central nervous system disease acquired when contaminated water enters the nose.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include rapid onset of severe headache, fever, nausea, vomiting, stiff neck, and altered mental status after freshwater exposure.
When to use this code
Assign B60.2 when the record confirms Naegleriasis or primary amebic meningoencephalitis caused by Naegleria fowleri. Use it for confirmed or documented suspected cases only if the provider records the diagnosis. Check documentation for exposure history and site of infection.
Do not use for
Do not use this code for other parasitic meningitis, bacterial meningitis, or nonspecific febrile illness after water exposure. If the organism is not documented, code the confirmed condition instead.
Coding tip
Verify the provider’s wording carefully, because Naegleriasis is uncommon and often documented under a different clinical term.