ICD-10-CM category
A83: Mosquito-borne viral encephalitis
Codes under A83 (Mosquito-borne viral encephalitis). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A83.0 | Japanese encephalitis | ✓ |
| A83.1 | Western equine encephalitis | ✓ |
| A83.2 | Eastern equine encephalitis | ✓ |
| A83.3 | St Louis encephalitis | ✓ |
| A83.4 | Australian encephalitis | ✓ |
| A83.5 | California encephalitis | ✓ |
| A83.6 | Rocio virus disease | ✓ |
| A83.8 | Other mosquito-borne viral encephalitis | ✓ |
| A83.9 | Mosquito-borne viral encephalitis, unspecified | ✓ |
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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