{"code":"A81","type":"category","title":"Atypical virus infections of central nervous system","codeAlso":[],"includes":["diseases of the central nervous system caused by prions"],"modern_v":"official26","codeFirst":[],"excludes1":["postpolio syndrome (G14)","sequelae of poliomyelitis (B91)","sequelae of viral encephalitis (B94.1)"],"excludes2":[],"isBillable":false,"sibling_codes":["A81.0","A81.1","A81.2","A81.8","A81.9"],"inclusionTerms":[],"sibling_titles":{"code":"A81.9","title":"Atypical virus infection of central nervous system, unspecified","isBillable":true},"useAdditionalCode":["code, if applicable, to identify:","dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)","dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)","dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)","dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)","dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)","mild neurocognitive disorder due to known physiological condition (F06.7-)"],"clinicalDefinition":"Atypical virus infections of central nervous system is a non-billable ICD-10-CM category code (A81). A more specific billable subcode must be selected for claims submission. Includes: diseases of the central nervous system caused by prions. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.","officialDefinition":"Atypical virus infections of central nervous system is a non-billable ICD-10-CM category code (A81). A more specific billable subcode must be selected for claims submission. Includes: diseases of the central nervous system caused by prions. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[{"code":"A81.0","title":"Creutzfeldt-Jakob disease","description":"Creutzfeldt-Jakob disease is a non-billable ICD-10-CM category code (A81.0). A more specific billable subcode must be selected for claims submission. Includes: diseases of the central nervous system caused by prions. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":false,"slug":"a81.0-creutzfeldt-jakob-disease"},{"code":"A81.00","title":"Creutzfeldt-Jakob disease, unspecified","description":"Creutzfeldt-Jakob disease, unspecified is a billable ICD-10-CM diagnosis code (A81.00). Includes: diseases of the central nervous system caused by prions. Inclusion terms: Jakob-Creutzfeldt disease, unspecified. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.00-creutzfeldt-jakob-disease-unspecified"},{"code":"A81.01","title":"Variant Creutzfeldt-Jakob disease","description":"Variant Creutzfeldt-Jakob disease is a billable ICD-10-CM diagnosis code (A81.01). Includes: diseases of the central nervous system caused by prions. Inclusion terms: vCJD. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.01-variant-creutzfeldt-jakob-disease"},{"code":"A81.09","title":"Other Creutzfeldt-Jakob disease","description":"Other Creutzfeldt-Jakob disease is a billable ICD-10-CM diagnosis code (A81.09). Includes: diseases of the central nervous system caused by prions. Inclusion terms: CJD; Familial Creutzfeldt-Jakob disease; Iatrogenic Creutzfeldt-Jakob disease; Sporadic Creutzfeldt-Jakob disease; Subacute spongiform encephalopathy (with dementia). Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.09-other-creutzfeldt-jakob-disease"},{"code":"A81.1","title":"Subacute sclerosing panencephalitis","description":"Subacute sclerosing panencephalitis is a billable ICD-10-CM diagnosis code (A81.1). Includes: diseases of the central nervous system caused by prions. Inclusion terms: Dawson's inclusion body encephalitis; Van Bogaert's sclerosing leukoencephalopathy. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.1-subacute-sclerosing-panencephalitis"},{"code":"A81.2","title":"Progressive multifocal leukoencephalopathy","description":"Progressive multifocal leukoencephalopathy is a billable ICD-10-CM diagnosis code (A81.2). Includes: diseases of the central nervous system caused by prions. Inclusion terms: Multifocal leukoencephalopathy NOS. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.2-progressive-multifocal-leukoencephalopathy"},{"code":"A81.8","title":"Other atypical virus infections of central nervous system","description":"Other atypical virus infections of central nervous system is a non-billable ICD-10-CM category code (A81.8). A more specific billable subcode must be selected for claims submission. Includes: diseases of the central nervous system caused by prions. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":false,"slug":"a81.8-other-atypical-virus-infections-of-central-nervous-system"},{"code":"A81.81","title":"Kuru","description":"Kuru is a billable ICD-10-CM diagnosis code (A81.81). Includes: diseases of the central nervous system caused by prions. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.81-kuru"},{"code":"A81.82","title":"Gerstmann-Sträussler-Scheinker syndrome","description":"Gerstmann-Sträussler-Scheinker syndrome is a billable ICD-10-CM diagnosis code (A81.82). Includes: diseases of the central nervous system caused by prions. Inclusion terms: GSS syndrome. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.82-gerstmann-strussler-scheinker-syndrome"},{"code":"A81.83","title":"Fatal familial insomnia","description":"Fatal familial insomnia is a billable ICD-10-CM diagnosis code (A81.83). Includes: diseases of the central nervous system caused by prions. Inclusion terms: FFI. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.83-fatal-familial-insomnia"},{"code":"A81.89","title":"Other atypical virus infections of central nervous system","description":"Other atypical virus infections of central nervous system is a billable ICD-10-CM diagnosis code (A81.89). Includes: diseases of the central nervous system caused by prions. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.89-other-atypical-virus-infections-of-central-nervous-system"},{"code":"A81.9","title":"Atypical virus infection of central nervous system, unspecified","description":"Atypical virus infection of central nervous system, unspecified is a billable ICD-10-CM diagnosis code (A81.9). Includes: diseases of the central nervous system caused by prions. Inclusion terms: Prion diseases of the central nervous system NOS. Excludes1 (not coded here): postpolio syndrome (G14); sequelae of poliomyelitis (B91); sequelae of viral encephalitis (B94.1). Use additional code: code, if applicable, to identify:; dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4); dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-); dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3); dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2); dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0); mild neurocognitive disorder due to known physiological condition (F06.7-).","isBillable":true,"slug":"a81.9-atypical-virus-infection-of-central-nervous-system-unspecified"}],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}