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ICD-10-CM Codes
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A00-B99
Certain infectious and parasitic diseases
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A80-A89
Viral and prion infections of the central nervous system
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Atypical virus infections of central nervous system A81
Atypical virus infections of central nervous system A81-
Use AdditionalUse Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
IncludesIncludes Help
"Includes" further defines, or give examples of, the content of the code or category.
- diseases of the central nervous system caused by prions
Codes
- A81 Atypical virus infections of central nervous system
- A81.0 Creutzfeldt-Jakob disease
- A81.00 …… unspecified
- A81.01 Variant Creutzfeldt-Jakob disease
- A81.09 Other Creutzfeldt-Jakob disease
- A81.1 Subacute sclerosing panencephalitis
- A81.2 Progressive multifocal leukoencephalopathy
- A81.8 Other atypical virus infections of central nervous system
- A81.81 Kuru
- A81.82 Gerstmann-Sträussler-Scheinker syndrome
- A81.83 Fatal familial insomnia
- A81.89 Other atypical virus infections of central nervous system
- A81.9 Atypical virus infection of central nervous system, unspecified