Enteroviral encephalitis

This code represents an acute inflammatory condition of the brain caused by an enterovirus infection. It manifests with neurological symptoms such as fever, headache, altered mental status, seizures, and focal neurological deficits, resulting from the viral invasion of the central nervous system.

Use this code when documentation confirms encephalitis specifically attributed to an enteroviral etiology. This diagnosis is typically supported by positive cerebrospinal fluid (CSF) viral studies (e.g., PCR for enterovirus), along with clinical signs and symptoms consistent with encephalitis.

• Ensure the documentation explicitly states "enteroviral" as the cause of encephalitis.
• Do not use for encephalitis of unknown origin or due to other specified viral agents.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter, followed by any associated neurological manifestations.