Dissociative identity disorder

This code represents a severe dissociative disorder characterized by the presence of two or more distinct personality states, or "alters," that recurrently take control of the individual's behavior. These identities often have different memories, behaviors, and ways of relating to the world, leading to significant gaps in memory for everyday events, personal information, and traumatic experiences. It is typically associated with severe and prolonged childhood trauma.

Use this code when documentation clearly indicates the presence of multiple distinct personality states, each with its own relatively enduring pattern of perceiving, relating to, and thinking about the environment and self. Supporting documentation should detail recurrent gaps in memory, a sense of depersonalization or derealization, and significant distress or impairment in social, occupational, or other important areas of functioning.

• Ensure documentation explicitly states "dissociative identity disorder" or "multiple personality disorder."
• Differentiate from other dissociative disorders (e.g., depersonalization/derealization disorder, dissociative amnesia) where distinct personality states are not present.
• Code any co-occurring mental health conditions, such as PTSD or major depressive disorder, as secondary diagnoses.