Viral and prion infections of the central nervous system
60 codes in this section
About Section A80-A89
Section A80-A89 (A80-A89) covers viral and prion infections of the central nervous system. It sits within the Certain infectious and parasitic diseases chapter (A00-B99). This section contains 60 ICD-10-CM codes, 48 billable diagnoses you can submit on a claim, and 12 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in A80-A89
Grouped by 3-character root code. Click any code for full detail.
| A80.0 | Acute paralytic poliomyelitis, vaccine-associated | Billable |
| A80.1 | Acute paralytic poliomyelitis, wild virus, imported | Billable |
| A80.2 | Acute paralytic poliomyelitis, wild virus, indigenous | Billable |
| A80.3 | Acute paralytic poliomyelitis, other and unspecified | Header |
| A80.30 | Acute paralytic poliomyelitis, unspecified | Billable |
| A80.39 | Other acute paralytic poliomyelitis | Billable |
| A80.4 | Acute nonparalytic poliomyelitis | Billable |
| A80.9 | Acute poliomyelitis, unspecified | Billable |
| A81.0 | Creutzfeldt-Jakob disease | Header |
| A81.00 | Creutzfeldt-Jakob disease, unspecified | Billable |
| A81.01 | Variant Creutzfeldt-Jakob disease | Billable |
| A81.09 | Other Creutzfeldt-Jakob disease | Billable |
| A81.1 | Subacute sclerosing panencephalitis | Billable |
| A81.2 | Progressive multifocal leukoencephalopathy | Billable |
| A81.8 | Other atypical virus infections of central nervous system | Header |
| A81.81 | Kuru | Billable |
| A81.82 | Gerstmann-Straussler-Scheinker syndrome | Billable |
| A81.83 | Fatal familial insomnia | Billable |
| A81.89 | Other atypical virus infections of central nervous system | Billable |
| A81.9 | Atypical virus infection of central nervous system, unspecified | Billable |
| A82.0 | Sylvatic rabies | Billable |
| A82.1 | Urban rabies | Billable |
| A82.9 | Rabies, unspecified | Billable |
| 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 |
| A84.0 | Far Eastern tick-borne encephalitis [Russian spring-summer encephalitis] | Billable |
| A84.1 | Central European tick-borne encephalitis | Billable |
| A84.8 | Other tick-borne viral encephalitis | Header |
| A84.81 | Powassan virus disease | Billable |
| A84.89 | Other tick-borne viral encephalitis | Billable |
| A84.9 | Tick-borne viral encephalitis, unspecified | Billable |
| A85.0 | Enteroviral encephalitis | Billable |
| A85.1 | Adenoviral encephalitis | Billable |
| A85.2 | Arthropod-borne viral encephalitis, unspecified | Billable |
| A85.8 | Other specified viral encephalitis | Billable |
| A87.0 | Enteroviral meningitis | Billable |
| A87.1 | Adenoviral meningitis | Billable |
| A87.2 | Lymphocytic choriomeningitis | Billable |
| A87.8 | Other viral meningitis | Billable |
| A87.9 | Viral meningitis, unspecified | Billable |
| A88.0 | Enteroviral exanthematous fever [Boston exanthem] | Billable |
| A88.1 | Epidemic vertigo | Billable |
| A88.8 | Other specified viral infections of central nervous system | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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