 Anorexia nervosa is an eating disorder in which a person does not eat enough to maintain a healthy body weight. This disorder can lead to starvation, which may, in turn, lead to heart failure or brain damage. Anorexia can also lead to a host of other health problems, including mild anemia, swollen joints, and brittle bones. Treatment for anorexia begins by attempting to bring the anorexic person to a healthy body weight, while also conducting therapy aimed at developing habits and ways of thinking that promote maintenance of a healthy weight. Traditionally, the first part of this treatmentrestoring healthy body weighthas taken place in inpatient hospital care. Recently, however, some patients have begun with high intensity inpatient care and then shifted to lower intensity outpatient care over the course of treatment. This study will compare the effectiveness of these two different methods of delivering treatment. 