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2007 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 330-338 > Anterior Horn Cell Disease 335.* > 2007 ICD-9-CM Diagnosis 335.9 Anterior horn cell disease 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 Therefore, this code may be out of date.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 335.9 can be accessed here. 335.9 is a specific code that can be used to specify a diagnosis 335.9 contains 3 index entries View the ICD-9-CM Volume 1 335.* hierarchy Index entries containing 335.9: Disease, diseased - see also Syndrome anterior horn cell 335.9 specified type NEC 335.8 Paralysis, paralytic (complete) (incomplete) 344.9 descending (spinal) NEC 335.9 Vasospasm 443.9 nerve peripheral NEC 335.9