2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Neurotic Disorders, Personality Disorders, And Other Nonpsychotic Mental Disorders 300-316 > Disturbance Of Conduct Not Elsewhere Classified 312.* > 2008 ICD-9-CM Diagnosis 312.12 Undersocialized conduct disorder unaggressive type moderate degree  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 Therefore, this code may be out of date.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 312.12 can be accessed here. 312.12 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 312.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog.