The American Psychological Association (APA) provides this definition of dissociative fugue
in DSM–IV–TR, a dissociative disorder in which the individual suddenly and unexpectedly travels away from home or a customary place of daily activities and is unable to recall some or all of their past. Symptoms also include either confusion about personal identity or assumption of a new identity. No other signs of mental disorder are present, and the fugue state can last from hours to months. Travel can be brief or extended in duration, and there may be no memory of travel once the individual is brought back to the prefugue state. In DSM-5 and DSM-5-TR, dissociative fugue is subsumed as a feature that may or may not occur with dissociative amnesia rather than as a separate diagnosis.