Specific code 2015 ICD-9-CM Diagnosis Code 323.81
Other causes of encephalitis and encephalomyelitis
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 323.81 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 323.81 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 323.81 converts approximately to:
  • 2015/16 ICD-10-CM G04.81 Other encephalitis and encephalomyelitis
Approximate Synonyms
  • Allergic encephalitis
  • Allergic encephalomyelitis
  • Autoimmune encephalitis
  • Bickerstaff brainstem encephalitis
  • Bickerstaff encephalitis, brainstem
  • Bickerstaff's brainstem encephalitis
  • Encephalitis, paraneoplastic
  • Encephalomyelitis, paraneoplastic
  • Eosinophilic meningoencephalitis
  • Eosinophilic meningoencephalitis due to Angiostrongylus cantonensis
  • Experimental allergic encephalomyelitis
  • Inflammation of brain and spinal cord due to toxic substance
  • Jamestown Canyon virus encephalitis
  • Paraneoplastic encephalitis
  • Paraneoplastic encephalomyelitis
  • Paraneoplastic limbic encephalitis
  • Pyogranulomatous meningoencephalomyelitis
  • Systemic lupus erythematosus encephalitis
Applies To
  • Noninfectious acute disseminated encephalomyelitis (ADEM)
ICD-9-CM Volume 2 Index entries containing back-references to 323.81:
  • ADEM (acute disseminated encephalomyelitis) (postinfectious) 136.9 [323.61]
    • noninfectious 323.81
  • Encephalitis (bacterial) (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) 323.9
    • posttraumatic 323.81
    • Rasmussen 323.81
    • specified cause NEC 323.81
  • Encephalomyelitis (chronic) (granulomatous) (myalgic, benign) (see also Encephalitis) 323.9
    • specified cause NEC 323.81
  • Lupus 710.0
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 323.81 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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.