2008 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 > Organic Sleep Disorders 327.* > 2008 ICD-9-CM Diagnosis 327.30 Circadian rhythm sleep disorder, 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 Therefore, this code may be out of date.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 327.30 can be accessed here. 327.30 is a specific code that can be used to specify a diagnosis 327.30 contains 1 index entry View the ICD-9-CM Volume 1 327.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 327.30: Disorder - see also Disease sleep 780.50 circadian rhythm 327.30 advanced sleep phase type 327.32 alcohol induced 291.82 delayed sleep phase type 327.31 drug induced 292.85 free running type 327.34 in conditions classified elsewhere 327.37 irregular sleep-wake type 327.33 jet lag type 327.35 other 327.39 shift work type 327.36