Dissociative disorder not otherwise specified

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Dissociative disorder not otherwise specified
Classification and external resources
ICD-10 F44.9
ICD-9-CM 300.15

Dissociative disorder not otherwise specified (DDNOS) is a mental health diagnosis for pathological dissociation that matches the DSM-IV criteria for a dissociative disorder, but does not fit the full criteria for any of the specifically identified subtypes, which include depersonalization disorder, dissociative amnesia, dissociative fugue, and dissociative identity disorder.[1] The International Statistical Classification of Diseases and Related Health Problems (ICD-10) refers to the diagnosis as dissociative disorder unspecified.[2]

Examples of DDNOS include Ganser's syndrome, disorders similar to dissociative identity disorder, chronic dissociative states as a result of being exposed to coercive persuasion, and derealization unaccompanied by depersonalization.[3] DDNOS is the most common dissociative disorder and is diagnosed in 40% of dissociative disorder cases.[4] It is often co-morbid with other mental illnesses such as complex posttraumatic stress disorder, major depressive disorder, personality disorders, substance abuse disorders and eating disorders.[5]

See also[edit]


  1. ^ American Psychiatric Association (2000). DSM-IV-TR (4th, revised ed.). American Psychiatric Press. p. 543. ISBN 0-89042-025-4. 
  2. ^ International Statistical Classification of Diseases and Related Health Problems, 10th Revision.  F44.9
  3. ^ Coons, P (1992). "Dissociative disorder not otherwise specified" (PDF).  p. 188
  4. ^ O'Neil; et al. (2008). Dissociation and the dissociative disorders : DSM-V and beyond. London: Routledge. p. 694. ISBN 978-0-415-95785-4. 
  5. ^ Brand; et al. (June 2009). "A naturalistic study of dissociative identity disorder and dissociative disorder not otherwise specified patients treated by community clinicians.". Psychological Trauma: Theory, Research, Practice, and Policy: 154–55. 

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