2017/18 ICD-10-CM Diagnosis Code A81

Atypical virus infections of central nervous system

Use Additional
Use 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.
  • code to identify:
  • dementia with behavioral disturbance (
    ICD-10-CM Diagnosis Code F02.81

    Dementia in other diseases classified elsewhere with behavioral disturbance

      2016 2017 2018 Billable/Specific Code Manifestation Code
    Applicable To
    • Dementia in other diseases classified elsewhere with aggressive behavior
    • Dementia in other diseases classified elsewhere with combative behavior
    • Dementia in other diseases classified elsewhere with violent behavior
    • Major neurocognitive disorder in other diseases classified elsewhere with aggressive behavior
    • Major neurocognitive disorder in other diseases classified elsewhere with combative behavior
    • Major neurocognitive disorder in other diseases classified elsewhere with violent behavior
    Use Additional
    • code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)
    F02.81
    )
  • dementia without behavioral disturbance (
    ICD-10-CM Diagnosis Code F02.80

    Dementia in other diseases classified elsewhere without behavioral disturbance

      2016 2017 2018 Billable/Specific Code Manifestation Code
    Applicable To
    • Dementia in other diseases classified elsewhere NOS
    • Major neurocognitive disorder in other diseases classified elsewhere
    F02.80
    )
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • diseases of the central nervous system caused by prions
The following code(s) above A81 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A81:
  • A00-B99
    2018 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A80-A89
    2018 ICD-10-CM Range A80-A89

    Viral and prion infections of the central nervous system

    Type 1 Excludes
    • postpolio syndrome (G14)
    • sequelae of poliomyelitis (B91)
    • sequelae of viral encephalitis (B94.1)
    Viral and prion infections of the central nervous system
Code History
ICD-10-CM Codes Adjacent To A81
A79.9 Rickettsiosis, unspecified
A80 Acute poliomyelitis
A80.0 Acute paralytic poliomyelitis, vaccine-associated
A80.1 Acute paralytic poliomyelitis, wild virus, imported
A80.2 Acute paralytic poliomyelitis, wild virus, indigenous
A80.3 Acute paralytic poliomyelitis, other and unspecified
A80.30 Acute paralytic poliomyelitis, unspecified
A80.39 Other acute paralytic poliomyelitis
A80.4 Acute nonparalytic poliomyelitis
A80.9 Acute poliomyelitis, unspecified
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

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