2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Hereditary And Degenerative Diseases Of The Central Nervous System 330-337 > Other Cerebral Degenerations 331.* > 2008 ICD-9-CM Diagnosis 331.9 Cerebral degeneration unspecified  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 331.9 can be accessed here. 331.9 is a specific code that can be used to specify a diagnosis 331.9 contains 8 index entries View the ICD-9-CM Volume 1 331.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 331.9: Atrophy, atrophic brain (cortex) (progressive) 331.9 with dementia 290.10 Alzheimer's 331.0 with dementia - see Alzheimer's, dementia circumscribed (Pick's) 331.11 with dementia with behavioral disturbance 331.11 [294.11] without behavioral disturbance 331.11 [294.10] congenital 742.4 hereditary 331.9 senile 331.2 cortical (see also Atrophy, brain) 331.9 Cirrhosis, cirrhotic 571.5 brain 331.9 Degeneration, degenerative brain (cortical) (progressive) 331.9 arteriosclerotic 437.0 childhood 330.9 specified type NEC 330.8 congenital 742.4 cystic 348.0 congenital 742.4 familial NEC 331.89 grey matter 330.8 heredofamilial NEC 331.89 in alcoholism 303.9 [331.7] beriberi 265.0 [331.7] cerebrovascular disease 437.9 [331.7] congenital hydrocephalus 742.3 [331.7] with spina bifida (see also Spina bifida) 741.0 [331.7] Babry's disease 272.7 [330.2] Gaucher's disease 272.7 [330.2] Hunter's disease or syndrome 277.5 [330.3] lipidosis cerebral 330.1 generalized 272.7 [330.2] mucopolysaccharidosis 277.5 [330.3] myxedema (see also Myxedema) 244.9 [331.7] neoplastic disease NEC (M8000/1) 239.9 [331.7] Niemann-Pick disease 272.7 [330.2] sphingolipidosis 272.7 [330.2] vitamin B12 deficiency 266.2 [331.7] motor centers 331.89 senile 331.2 specified type NEC 331.89 Depression 311 cerebral 331.9 newborn 779.2 Hypofunction cerebral 331.9 Marasmus 261 brain 331.9