2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Other Disorders Of The Central Nervous System 340-349 > Other Demyelinating Diseases Of Central Nervous System 341.* > 2008 ICD-9-CM Diagnosis 341.9 Demyelinating disease of central nervous system 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 Therefore, this code may be out of date.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 341.9 can be accessed here. 341.9 is a specific code that can be used to specify a diagnosis 341.9 contains 5 index entries View the ICD-9-CM Volume 1 341.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 341.9: Degeneration, degenerative myelin, central nervous system NEC 341.9 Demyelination, demyelinization central nervous system 341.9 specified NEC 341.8 Disease, diseased - see also Syndrome demyelinating, demyelinizating (brain stem) (central nervous system) 341.9 multiple sclerosis 340 specified NEC 341.8 Sclerosis, sclerotic brain (general) (lobular) 341.9 Alzheimer's - see Alzheimer's, dementia artery, arterial 437.0 atrophic lobar 331.0 with dementia with behavioral disturbance 331.0 [294.11] without behavioral disturbance 331.0 [294.10] diffuse 341.1 familial (chronic) (infantile) 330.0 infantile (chronic) (familial) 330.0 Pelizaeus-Merzbacher type 330.0 disseminated 340 hereditary 334.2 infantile (degenerative) (diffuse) 330.0 insular 340 Krabbe's 330.0 miliary 340 multiple 340 Pelizaeus-Merzbacher 330.0 progressive familial 330.0 senile 437.0 tuberous 759.5 Syndrome - see also Disease demyelinating NEC 341.9