Diagnostic Code 6335 · 38 CFR §4.88b
West Nile virus is a mosquito-borne illness that can cause mild flu-like symptoms in most cases but devastating neurological disease in others. The most serious forms — encephalitis and meningitis — can cause permanent neurological damage. The VA uses the General Rating Formula. Residuals including variable physical, functional, and cognitive disabilities are rated under appropriate body system codes.
| Rating | Criteria |
|---|---|
| 100% | Active West Nile virus neuroinvasive disease (encephalitis or meningitis) during treatment and recovery. |
| 0% | Resolved. Residual variable physical, functional, and cognitive disabilities are rated under appropriate neurological codes. |
Serological testing confirming West Nile virus (IgM antibodies in blood or CSF). Medical records from the acute illness. Service records showing location. Neurological examination. Neuropsychological testing if cognitive impairment is present.
Yes. Neuroinvasive forms can cause permanent cognitive impairment, muscle weakness, and in severe cases paralysis.
If you were hospitalized with high fever, confusion, severe headache, stiff neck, or muscle weakness, you likely had neuroinvasive disease.