Individuals with the best prognosis have the disorder identified early and pursue treatment soon thereafter. Assessment of Anorexia Nervosa should include gathering information about the disturbed eating behaviors and thoughts related to eating, shape and weight that are necessary to meet DSM-IV criteria for the disorder. Physical and medical status should also be assessed. Additionally, co-morbid diagnoses should be assessed. It is also important to rule out other psychiatric or medical conditions that may cause weight loss.