Other specified tick-borne viral encephalitis

This code signifies an inflammatory condition of the brain caused by a tick-borne virus, where the specific type of viral encephalitis is known but not explicitly listed elsewhere in the ICD-9-CM classification. It represents a neurological infection transmitted by ticks, leading to symptoms such as fever, headache, altered mental status, and seizures.

Use this code when documentation specifies a tick-borne viral encephalitis and the specific virus is identified (e.g., Powassan virus, Kyasanur Forest disease virus) but does not have a unique ICD-9-CM code. This code requires physician documentation explicitly stating "tick-borne viral encephalitis" and specifying the viral agent.

• Ensure the documentation clearly identifies the viral agent as tick-borne and specifies the type if not otherwise classified.
• Do not use this code for unspecified viral encephalitis or encephalitis due to non-tick-borne viruses.
• Consider sequencing this code after any codes for the acute symptoms or complications of the encephalitis.