2025 ICD-10-CM code A83
Mosquito-borne viral encephalitis. Includes mosquito-borne viral meningoencephalitis.
Medical necessity is established by the signs and symptoms of encephalitis potentially linked to mosquito-borne viruses. Confirmation through laboratory testing strengthens the medical necessity for treatment and management.
Providers diagnose the condition based on patient history, physical examination, and neurological examination. Imaging techniques include computed tomography (CT), electroencephalograph (EEG), and magnetic resonance imaging (MRI) of the brain. A spinal tap for cerebrospinal fluid (CSF) examination may confirm the diagnosis. Treatment is symptomatic and may include intravenous corticosteroids, rest, fluids, pain relievers, and sedatives.
- Certain infectious and parasitic diseases (A00-B99)
- Viral and prion infections of the central nervous system (A80-A89)
In simple words: Mosquito-borne viral encephalitis is a brain infection caused by a virus spread through mosquito bites. The mosquito gets the virus by biting infected birds or animals.
Mosquito-borne viral encephalitis refers to inflammation and/or swelling of the brain due to a mosquito bite. The mosquito acquires the viral infection when it bites infected birds or animals. The most common mosquito-borne viruses are West Nile virus (WNV), St. Louis encephalitis (SLE), and western equine encephalomyelitis (WEE).
Example 1: A patient presents with fever, headache, stiff neck, and lethargy after being bitten by a mosquito in a known West Nile virus area., An infant develops seizures, confusion, and brain swelling after a mosquito bite during an outbreak of western equine encephalomyelitis., An elderly individual experiences fever, headache, and disorientation after mosquito bites, and St. Louis encephalitis is confirmed through CSF analysis.
Documentation should include patient history (including mosquito exposure), physical and neurological exam findings, imaging results (CT, EEG, MRI), and CSF analysis if performed. Details of symptoms like fever, headache, stiff neck, lethargy, confusion, seizures, etc., should be documented.
- Specialties:Infectious Disease, Neurology
- Place of Service:Inpatient Hospital, Office, Emergency Room - Hospital