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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Infectious And Parasitic Diseases 001-139 > Poliomyelitis And Other Non-Arthropod-Borne Viral Diseases Of Central Nervous System 045-049 > Other Non-Arthropod-Borne Viral Diseases Of Central Nervous System 049.* > 2008 ICD-9-CM Diagnosis 049.9 Unspecified non-arthropod-borne viral diseases of central nervous system  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 049.9 can be accessed here. 049.9 is a specific code that can be used to specify a diagnosis 049.9 contains 7 index entries View the ICD-9-CM Volume 1 049.* hierarchy 049.9 also known as: Viral encephalitis NOS Index entries containing 049.9: Disease, diseased - see also Syndrome nonarthropod-borne NEC 078.89 central nervous system NEC 049.9 virus (filterable) NEC 078.89 central nervous system NEC 049.9 specified type NEC 049.8 nonarthropod-borne NEC 078.89 central nervous system NEC 049.9 specified NEC 049.8 Encephalitis (bacterial) (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) 323.9 viral, virus 049.9 arthropod-borne NEC 064 mosquito-borne 062.9 Australian X disease 062.4 California virus 062.5 Eastern equine 062.2 Ilheus virus 062.8 Japanese (B type) 062.0 Murray Valley 062.4 specified type NEC 062.8 St. Louis 062.3 type B 062.0 type C 062.3 Western equine 062.1 tick-borne 063.9 biundulant 063.2 Central European 063.2 Czechoslovakian 063.2 diphasic meningoencephalitis 063.2 Far Eastern 063.0 Langat 063.8 louping ill 063.1 Powassan 063.8 Russian spring-summer (taiga) 063.0 specified type NEC 063.8 vector unknown 064 slow acting NEC 046.8 specified type NEC 049.8 vaccination, prophylactic (against) V05.0 Infection, infected, infective (opportunistic) 136.9 virus, viral 079.99 central nervous system NEC 049.9 enterovirus 048 meningitis 047.9 specified type NEC 047.8 slow virus 046.9 specified condition NEC 046.8 encephalitis 049.9 arthropod-borne NEC 064 tick-borne 063.9 specified type NEC 063.8 Myelitis (ascending) (cerebellar) (childhood) (chronic) (descending) (diffuse) (disseminated) (pressure) (progressive) (spinal cord) (subacute) (see also Encephalitis) 323.9 virus 049.9