Far Eastern tick-borne encephalitis

This code signifies a severe viral infection of the central nervous system transmitted by ticks, specifically the Far Eastern subtype of tick-borne encephalitis (TBE). It is characterized by fever, headache, and often progresses to meningoencephalitis, potentially leading to long-term neurological sequelae or death.

Assign this code for confirmed cases of Far Eastern tick-borne encephalitis, also known as Russian spring-summer encephalitis, based on laboratory confirmation or strong epidemiological and clinical evidence. Documentation should clearly indicate the specific subtype of TBE to differentiate it from other forms.

• Ensure documentation specifies "Far Eastern" or "Russian spring-summer" to distinguish from other tick-borne encephalitis types (e.g., Central European).
• Code any associated neurological manifestations (e.g., meningitis, encephalitis) as secondary diagnoses.
• Consider Z20.828 (Contact with and (suspected) exposure to other viral communicable diseases) if exposure is suspected but the disease is not confirmed.