Other mosquito-borne viral encephalitis

This code signifies inflammation of the brain caused by a viral infection transmitted by mosquitoes, where the specific type of mosquito-borne encephalitis is known but does not have a more specific ICD-10-CM code. It encompasses various less common or unspecified arboviral encephalitides that are not separately classified.

Use this code when documentation confirms a diagnosis of mosquito-borne viral encephalitis, and the specific causative virus (e.g., Japanese encephalitis, West Nile encephalitis) is not identified or is one for which a more precise code is unavailable. This code is appropriate when the physician explicitly states "other mosquito-borne viral encephalitis" or a similar non-specific diagnosis.

• Always seek to identify the specific type of mosquito-borne encephalitis (e.g., West Nile, Japanese) as more specific codes exist.
• Do not use this code if the encephalitis is not confirmed to be mosquito-borne or if the vector is unknown.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any associated neurological manifestations.