Specific code 2012 ICD-9-CM Diagnosis Code 323.51
Encephalitis and encephalomyelitis following immunization procedures
  • Short description: Enceph/myel folwg immune.
  • ICD-9-CM 323.51 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 323.51 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2012 version of ICD-9-CM 323.51.
  • More recent version(s) of ICD-9-CM 323.51: 2013 2014.
Disease Synonyms
  • Encephalitis following immunization
  • Encephalitis, late effect of immunization
  • Post BCG vaccination encephalitis
  • Post cholera vaccination encephalitis
  • Post diphtheria vaccination encephalitis
  • Post hepatitis A vaccination encephalitis
  • Post hepatitis B vaccination encephalitis
  • Post influenza vaccination encephalitis
  • Post measles vaccination encephalitis
  • Post mixed vaccination encephalitis
  • Post mumps vaccination encephalitis
  • Post paratyphoid vaccination encephalitis
  • Post pertussis vaccination encephalitis
  • Post plague vaccination encephalitis
  • Post polio vaccination encephalitis
  • Post rabies vaccination encephalitis
  • Post rubella vaccination encephalitis
  • Post smallpox vaccination encephalitis
  • Post tetanus vaccination encephalitis
  • Post typhoid vaccination encephalitis
  • Post typhus vaccination encephalitis
  • Post yellow fever vaccination encephalitis
  • Post-immunization encephalitis
  • Postvaccinal encephalomyelitis
Applies To
  • Encephalitis postimmunization or postvaccinal
  • Encephalomyelitis postimmunization or postvaccinal
Convert to ICD-10-CM: 323.51 converts approximately to:
  • 2014 ICD-10-CM G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
    Or:
  • 2014 ICD-10-CM G04.32 Postimmunization acute necrotizing hemorrhagic encephalopathy
ICD-9-CM Volume 2 Index entries containing back-references to 323.51:
  • Complications
    • vaccination 999.9
      • anaphylaxis NEC 999.42
      • cellulitis 999.39
      • encephalitis or encephalomyelitis 323.51
      • hepatitis (serum) (type B) (within 8 months after administration) - see Hepatitis, viral
      • infection (general) (local) NEC 999.39
      • jaundice (serum) (within 8 months after administration) - see Hepatitis, viral
      • meningitis 997.09 [321.8]
      • myelitis 323.52
      • protein sickness 999.52
      • reaction (allergic) 999.52
      • sepsis 999.39
      • serum intoxication, sickness, rash, or other serum reaction NEC 999.52
      • shock (allergic) (anaphylactic) 999.49
      • subacute yellow atrophy of liver (within 8 months after administration) - see Hepatitis, viral
      • vaccinia (generalized) 999.0
  • 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
    • following vaccination or other immunization procedure 323.51
    • postimmunization 323.51
    • postvaccinal (smallpox) 323.51
  • Encephalomyelitis (chronic) (granulomatous) (myalgic, benign) (see also Encephalitis) 323.9
    • postimmunization 323.51
    • postvaccinal (smallpox) 323.51
  • Encephalopathy (acute) 348.30
    • due to
      • birth injury (intracranial) 767.8
      • dialysis 294.8
      • drugs - (see also Table of Drugs and Chemicals) 349.82
      • hyperinsulinism - see Hyperinsulinism
      • influenza (virus) (see also Influenza) 487.8
      • lack of vitamin (see also Deficiency, vitamin) 269.2
      • nicotinic acid deficiency 291.2
      • serum (nontherapeutic) (therapeutic) 999.59
      • syphilis 094.81
      • trauma (postconcussional) 310.2
        • current (see also Concussion, brain) 850.9
          • with skull fracture - see Fracture, skull, by site, with intracranial injury
      • vaccination 323.51
  • Leukoencephalitis
    • acute hemorrhagic (postinfectious) NEC 136.9 [323.61]
      • postimmunization or postvaccinal 323.51
  • Leukoencephalopathy (see also Encephalitis) 323.9
    • acute necrotizing hemorrhagic (postinfectious) 136.9 [323.61]
      • postimmunization or postvaccinal 323.51
  • Meningoencephalomyelitis (see also Meningoencephalitis) 323.9
    • acute NEC 048
      • disseminated (postinfectious) 136.9 [323.61]
        • postimmunization or postvaccination 323.51
  • Myelinoclasis, perivascular, acute (postinfectious) NEC 136.9 [323.61]
    • postimmunization or postvaccinal 323.51
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 323.51 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 2012 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.