International Statistical Classification of Diseases and Related Health Problems
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".