Other specified mosquito-borne viral encephalitis

This code signifies a viral inflammation of the brain caused by a mosquito-borne pathogen that is not specifically classified elsewhere. It encompasses various less common or unspecified types of arboviral encephalitis transmitted by mosquitoes, leading to symptoms such as fever, headache, altered mental status, and neurological deficits.

Use this code when documentation clearly indicates mosquito-borne viral encephalitis, but the specific type (e.g., West Nile, St. Louis, Japanese encephalitis) is not identified or falls outside of other specific ICD-9-CM codes. Supporting documentation would include laboratory confirmation of a viral encephalitis and epidemiological evidence or patient history suggesting mosquito exposure.

• Ensure documentation specifies "mosquito-borne" to differentiate from other viral encephalitides.
• Do not use if a more specific ICD-9-CM code for a known mosquito-borne encephalitis exists (e.g., West Nile).
• Always query the provider for a more specific diagnosis if only "viral encephalitis" is documented and mosquito exposure is suspected.