A83.5
California encephalitis
Clinical Classification Guidelines
Inclusion Terms
- California meningoencephalitis
- La Crosse encephalitis
Medical Intelligence & Overview
California encephalitis, also known as La Crosse encephalitis, is a viral brain infection transmitted through mosquito bites. It primarily affects children and can cause inflammation of the brain, which may lead to serious health issues. Recognized under the ICD-10 code A83.5, this disease is most common in regions of the United States where the specific mosquitoes and rodents involved are prevalent. Awareness of its causes, symptoms, and available treatment options can help with early detection and management of this condition.
Causes & Symptoms
Clinical Causes: The virus responsible for California encephalitis is mainly transmitted through the bite of infected mosquitoes, particularly the eastern and western tree-hole mosquito (Aedes triseriatus). The virus has a natural cycle involving rodents, especially squirrels and chipmunks, which serve as reservoirs. Transmission to humans occurs predominantly during the summer and early fall when mosquito activity is high.
Key Symptoms: High fever Headache Nausea and vomiting Disorientation and confusion Sensitivity to light (photophobia) Seizures in severe cases Stiff neck Weakness or fatigue Loss of appetite In severe instances, coma can occur.
Diagnostic & Treatment
Diagnosis Path: Diagnosing California encephalitis involves a combination of clinical evaluation and laboratory testing. Healthcare providers may perform the following:
Treatment Protocols: There is no specific antiviral treatment for California encephalitis. Management primarily focuses on relieving symptoms and supporting the patient's recovery:
Clinical Advice & FAQs
Billing Guidance
Is A83.5 a billable ICD-10 code?
Yes, A83.5 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report A83.5?
Clinical documentation must specify the nature of California encephalitis and any associated comorbidities for accurate reporting.
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