In DSM-III, this category is called Atypical Eating Disorder
This category is a residual category for eating disorders that cannot be adequately classified in any of the previous categories.
In DSM-IV, this category is called Eating Disorder Not Otherwise Specified
The Eating Disorder Not Otherwise Specified category is for disorders of eating that do not meet the criteria for any specified Eating Disorder. Examples include
- For females, all of the criteria for Anorexia Nervosa are met except that the individual has regular menses.
- All of the criteria for Anorexia Nervosa are met except that, despite significant weight loss, the individual's current weight is in the normal range.
- All of the criteria for Bulimia Nervosa are met except that the binge eating and inappropriate compensatory mechanisms occur at a frequency of less than twice a week or for a duration of less than 3 months.
- The regular use of inappropriate compensatory behavior by an individual of normal body weight after eating small amounts of food (e.g., self-induced vomiting after the consumption of two cookies).
- Repeatedly chewing and spitting out, but not swallowing, large amounts of food.
- Binge-eating disorder: recurrent episodes of binge eating in the absence of the regular use of inappropriate compensatory behaviors characteristic of Bulimia Nervosa.
This category applies to presentations in which symptoms characteristic of a feeding or eating disorder that cause clinically significant distress or impairment in social, occupational, or other important areas of functioning predominate but do not meet the full criteria for any of the disorders in the feeding and eating disorders diagnostic class. The unspecified feeding and eating disorder category is used in situations in which the clinician chooses not to specify the reason that the criteria are not met for a specific feeding or eating disorder, and includes presentation in which there is insufficient information to make a more specific diagnosis (e.g., in emergency room settings).