Specific code icon 2014 ICD-10-CM Diagnosis Code G31.9

Degenerative disease of nervous system, unspecified

  • G31.9 is a billable ICD-10-CM code that can be used to specify a diagnosis.
  • On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, G31.9 and all other ICD-10-CM codes should only be used for training or planning purposes until then.
Clinical Information
  • A disorder of the central nervous system characterized by gradual and progressive loss of neural tissue and neurologic function.
  • Hereditary and sporadic conditions which are characterized by progressive nervous system dysfunction. These disorders are often associated with atrophy of the affected central or peripheral nervous system structures.
  • Neurologic disorders characterized by progressive nervous system dysfunction and loss of neural tissue.
Description Synonyms
  • Cerebellar paraneoplastic degeneration
  • Cerebral degeneration in childhood
  • Degenerative brain disorder
  • Paraneoplastic cerebellar degeneration
Mortality Data
  • Between 1999-2007 there were 9,786 deaths in the United States where ICD-10 G31.9 was indicated as the underlying cause of death [source: cdc.govlink to cdc.gov]
  • ICD-10 G31.9 as underlying cause of death data broken down by: gender, age, race, year
ICD-10-CM G31.9 is grouped within Diagnostic Related Group(s) (MS-DRG v30.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc
Convert ICD-10-CM G31.9 to ICD-9-CM
The following ICD-10-CM Index entries contain back-references to ICD-10-CM G31.9: