2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Inflammatory Diseases Of The Central Nervous System 320-327 > 2006 ICD-9-CM Diagnosis 327 Sleep disorders View the most recent version of ICD-9-CM 327 327 is a non-specific code that cannot be used to specify a diagnosis