Specific code 2014 ICD-9-CM Diagnosis Code 323.9
Unspecified causes of encephalitis, myelitis, and encephalomyelitis
  • Billable Code
  • Short description: Encephalitis NOS.
  • ICD-9-CM 323.9 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 323.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Acute and subacute hemorrhagic leukoencephalitis [Hurst]
  • Acute ascending myelitis
  • Acute hemorrhagic leukoencephalitis (disorder)
  • Acute necrotizing myelitis
  • Acute non-infective transverse myelitis
  • Acute transverse myelitis
  • Acute viral transverse myelitis
  • Brainstem encephalitis
  • Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
  • Cerebral irritation
  • Encephalitis
  • Encephalitis associated with AIDS
  • Encephalitis, limbic
  • Encephalitis, myelitis and encephalomyelitis
  • Encephalomyelitis
  • Encephalomyelitis, hemorrhagic, acute
  • Focal encephalitis
  • Fungal infection of brain
  • Granulomatous meningoencephalitis
  • Granulomatous meningoencephalomyelitis
  • Inflammation of spinal cord due to toxin
  • Leukoencephalopathy
  • Leukoencephalopathy, subcortical
  • Limbic encephalitis
  • Meningoencephalitis
  • Meningoencephalomyelitis
  • Meningomyelitis
  • Myelitis
  • Myelitis associated with AIDS
  • Necrotizing myelitis of CNS, subacute
  • Primary encephalitis
  • Rasmussen syndrome
  • Subacute hemorrhagic leukoencephalitis
  • Subacute necrotizing myelitis
  • Subcortical leukoencephalopathy (disorder)
  • Transverse myelopathy syndrome
Convert to ICD-10-CM: 323.9 converts approximately to:
  • 2014 ICD-10-CM G04.90 Encephalitis and encephalomyelitis, unspecified
    Or:
  • 2014 ICD-10-CM G04.91 Myelitis, unspecified
ICD-9-CM Volume 2 Index entries containing back-references to 323.9:
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 323.9 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.