A83.5

Applicable To

• California meningoencephalitis

• La Crosse encephalitis

Approximate Synonyms

• La crosse encephalitis

• La crosse virus encephalitis

Clinical Information

• A viral infection of the brain caused by serotypes of california encephalitis virus encephalitis virus, california) transmitted to humans by the mosquito aedes triseriatus. The majority of cases are caused by the la crosse virus. This condition is endemic to the midwestern United States and primarily affects children between 5-10 years of age. Clinical manifestations include fever; vomiting; headache; and abdominal pain followed by seizures, altered mentation, and focal neurologic deficits. from Joynt, Clinical Neurology, 1996, ch26, p13)

Details

• A83.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• The 2023 edition of ICD-10-CM A83.5 became effective on October 1, 2022.

• This is the American ICD-10-CM version of A83.5 – other international versions of ICD-10 A83.5 may differ.