疾病及び関連保健問題の国際統計分類
In the study "Disorders of Personality: DSM-IV-TM and Beyond" (1996), Theodore Millon suggested five subtypes of narcissist; however, there are few, pure subtypes of narcissist. Moreover, Millon's five subtypes of narcissist are not recognized in either the "Diagnostic and Statistical Manual of Mental Disorders" or in the "International Statistical Classification of Diseases and Related Health Problems".