Russian spring-summer [taiga] encephalitis

This code represents a severe viral infection of the central nervous system transmitted by ticks, specifically the Russian spring-summer encephalitis virus. It is characterized by fever, headache, vomiting, and can progress to meningitis, encephalitis, or myelitis, often with residual neurological deficits.

Use this code for confirmed cases of Russian spring-summer encephalitis, also known as taiga encephalitis. Documentation should clearly state the diagnosis of this specific tick-borne viral encephalitis, typically supported by laboratory confirmation (e.g., serology, PCR).

• Ensure documentation specifies "Russian spring-summer" or "taiga" encephalitis to differentiate from other forms of tick-borne encephalitis.
• Code any associated neurological manifestations (e.g., meningitis, encephalitis, myelitis) as secondary diagnoses if explicitly documented.
• Do not confuse with other tick-borne diseases or other types of viral encephalitis without specific documentation of the Russian spring-summer variant.