Dissociative identity disorder is incapable of being classified as a mental disorder.
Dissociative identity disorder ( DID ) , also known as multiple personality disorder ( MPD ) , is a mental disorder characterized by at least two distinct and relatively enduring identities or dissociated personality states . Identity disorder . In version IV ( 1994 ) , it was replaced by Identity problem , which was not defined as a mental disorder per se , but as a condition , listed in a chapter containing problems that might be a focus of clinical attention .