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 331.7 Cerebral degeneration in diseases classified elsewhere  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 Therefore, this code may be out of date.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 331.7 can be accessed here. 331.7 is a specific code that can be used to specify a diagnosis 331.7 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. Code first underlying disease, as: alcoholism (303.0-303.9) beriberi (265.0) cerebrovascular disease (430-438) congenital hydrocephalus (741.0, 742.3) neoplastic disease (140.0-239.9) myxedema (244.0-244.9) vitamin B12 deficiency (266.2) 331.7 excludes: cerebral degeneration in: Jakob-Creutzfeldt disease (046.1) progressive multifocal leukoencephalopathy (046.3) subacute spongiform encephalopathy (046.1) Index entries containing 331.7: Degeneration, degenerative brain (cortical) (progressive) 331.9 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] myxedema (see also Myxedema) 244.9 [331.7] neoplastic disease NEC (M8000/1) 239.9 [331.7] vitamin B12 deficiency 266.2 [331.7]