Specific code 2014 ICD-9-CM Diagnosis Code 049.8
Other specified non-arthropod-borne viral diseases of central nervous system
  • Billable Code
  • Short description: Viral encephalitis NEC.
  • ICD-9-CM 049.8 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 049.8 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Acute necrotizing encephalitis
  • Adenoviral encephalitis
  • Dubini's chorea
  • Electric chorea
  • Encephalitis infective
  • Encephalitis lethargica
  • Enteroviral encephalitis
  • Epidemic encephalitis
  • Fungal encephalitis
  • Infective encephalitis
  • Rhabdovirus encephalitis
  • Rio Bravo fever
  • Rio Bravo viral encephalitis
049.8 Excludes
  • human herpesvirus 6 encephalitis (058.21)
  • other human herpesvirus encephalitis (058.29)
Applies To
  • Encephalitis:
    • acute:
      • inclusion body
      • necrotizing
    • epidemic
    • lethargica
    • Rio Bravo
  • von Economo's disease
Convert to ICD-10-CM: 049.8 converts approximately to:
  • 2014 ICD-10-CM A85.0 Enteroviral encephalitis
    Or:
  • 2014 ICD-10-CM A85.1 Adenoviral encephalitis
    Or:
  • 2014 ICD-10-CM A85.8 Other specified viral encephalitis
    Or:
  • 2014 ICD-10-CM A88.8 Other specified viral infections of central nervous system
ICD-9-CM Volume 2 Index entries containing back-references to 049.8:
  • Akureyri disease (epidemic neuromyasthenia) 049.8
  • Chorea (gravis) (minor) (spasmodic) 333.5
    • electric 049.8
  • Cruchet's disease (encephalitis lethargica) 049.8
  • Disease, diseased - see also Syndrome
    • Akureyri (epidemic neuromyasthenia) 049.8
    • Cruchet's (encephalitis lethargica) 049.8
    • Dubini's (electric chorea) 049.8
    • Economo's (encephalitis lethargica) 049.8
    • Guertin's (electric chorea) 049.8
    • iceland (epidemic neuromyasthenia) 049.8
    • virus (filterable) NEC 078.89
      • arbovirus NEC 066.9
      • arthropod-borne NEC 066.9
      • central nervous system NEC 049.9
        • specified type NEC 049.8
      • complicating pregnancy, childbirth, or puerperium 647.6
      • contact (with) V01.79
      • exposure to V01.79
      • Marburg 078.89
      • maternal
        • with fetal damage affecting management of pregnancy 655.3
      • nonarthropod-borne NEC 078.89
        • central nervous system NEC 049.9
          • specified NEC 049.8
      • vaccination, prophylactic (against) V04.89
    • von Economo's (encephalitis lethargica) 049.8
  • Dubini's disease (electric chorea) 049.8
  • Economo's disease (encephalitis lethargica) 049.8
  • Encephalitis (bacterial) (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) 323.9
    • acute - see also Encephalitis, viral
      • disseminated (postinfectious) NEC 136.9 [323.61]
        • postimmunization or postvaccination 323.51
      • inclusional 049.8
      • inclusion body 049.8
      • necrotizing 049.8
    • endemic 049.8
    • epidemic 049.8
    • infectious (acute) (virus) NEC 049.8
    • influenzal (see also Influenza) 487.8 [323.41]
      • lethargic 049.8
    • lethargic (acute) (infectious) (influenzal) 049.8
    • lethargica 049.8
    • Mengo 049.8
    • myoclonic 049.8
    • Rio Bravo 049.8
    • Vienna type 049.8
    • von Economo's 049.8
  • Encephalomyelitis (chronic) (granulomatous) (myalgic, benign) (see also Encephalitis) 323.9
    • abortive disseminated 049.8
    • funicularis infectiosa 049.8
    • Munch-Peterson's 049.8
  • Guertin's disease (electric chorea) 049.8
  • Iceland disease (epidemic neuromyasthenia) 049.8
  • Meningomyelitis (see also Meningoencephalitis) 323.9
    • lethargic 049.8
  • Neuromyasthenia (epidemic) 049.8
  • Vienna-type encephalitis 049.8
  • von Economo's disease (encephalitis lethargica) 049.8
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 049.8 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.