Dr. Eddy is the Co-Director of the Eating Disorders Clinical and Research Program (EDCRP) at Massachusetts General Hospital and an Associate Professor of Psychology in the Department of Psychiatry at Harvard Medical School. Dr. Eddy focuses her research on the diagnostic classification of eating disorders, particularly among children and adolescents.

She is the author or co-author of more than 120 scientific publications, and co-author of the book Cognitive-Behavioral Therapy for Avoidant/Restrictive Food Intake Disorder: Children, Adolescents, and Adults.

She is currently Principal Investigator on an NIMH-funded study of the neurobiology underlying illness course and recovery in adolescents, and leads one of the longest-running outcome studies of anorexia nervosa and bulimia nervosa examining recovery rates over 25 years.

She initially trained in family-based treatment (FBT) with one of the principal architects of the method (Daniel Le Grange, PhD), now provides FBT for patients at the EDCRP, and has supervised numerous doctoral students, pre-doctoral interns, psychiatry residents, psychiatry fellows, and junior faculty in the provision of FBT for eating disorders over the past 10 years. She provides psychotherapy trainings on FBT locally, nationally, and internationally, and is the primary faculty speaker for the FBT section of the MGH Psychiatry Academy course on the Evidence-Based Treatment of Eating Disorders.