ICD-10-CM · FY 2026 APRIL UPDATE
A83
Mosquito-borne viral encephalitis
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| A83.0 | Japanese encephalitis | Billable |
| A83.1 | Western equine encephalitis | Billable |
| A83.2 | Eastern equine encephalitis | Billable |
| A83.3 | St Louis encephalitis | Billable |
| A83.4 | Australian encephalitis | Billable |
| A83.5 | California encephalitis | Billable |
| A83.6 | Rocio virus disease | Billable |
| A83.8 | Other mosquito-borne viral encephalitis | Billable |
| A83.9 | Mosquito-borne viral encephalitis, unspecified | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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