2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Neurotic Disorders, Personality Disorders, And Other Nonpsychotic Mental Disorders 300-316 > Personality Disorders 301.* > 2008 ICD-9-CM Diagnosis 301.20 Schizoid personality 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 Therefore, this code may be out of date.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 301.20 can be accessed here. A personality disorder manifested by a profound defect in the ability to form social relationships, no desire for social involvement, and an indifference to praise or criticism. 301.20 is a specific code that can be used to specify a diagnosis 301.20 contains 4 index entries View the ICD-9-CM Volume 1 301.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 301.20: Disorder - see also Disease personality 301.9 schizoid 301.20 introverted 301.21 schizotypal 301.22 Personality schizoid 301.20 introverted 301.21 schizotypal 301.22 Schizoid personality 301.20 introverted 301.21 schizotypal 301.22 Schizothymia 301.20 introverted 301.21 schizotypal 301.22