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 > Sleep Disorders 327.* > 2006 ICD-9-CM Diagnosis 327.0 Insomnia View the most recent version of ICD-9-CM 327.0 327.0 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 327.* hierarchy 327.0 Excludes insomnia NOS (780.52) insomnia not due to a substance or known physiological condition (307.41-307.42) insomnia with sleep apnea NOS (780.51)