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Meet Our Team

Physicians

Sarah Fleet, MD

Sarah Fleet , MD

Gastroenterologist, Division of Gastroenterology, Hepatology and Nutrition
Instructor of Pediatrics, Harvard Medical School
Lisa Mahoney, MD

Lisa Mahoney , MD

Gastroenterologist, Division of Gastroenterology, Hepatology and Nutrition
Assistant Professor of Pediatrics, Harvard Medical School
Dennis Spencer, MD, PhD

Dennis Spencer , MD, PhD

Gastroenterologist, Division of Gastroenterology, Hepatology and Nutrition; Director, Equity Diversity and Inclusion, Division of Gastroenterology, Hepatology and Nutrition; Associate Program Director, Boston Combined Residency Program (BCRP)
Instructor of Pediatrics, Harvard Medical School
Desiree Sierra-Velez, MD

Desiree Sierra-Velez , MD

Medical Director, Adolescent Weight Loss (Bariatric) Surgery Program; Gastroenterologist, Division of Gastroenterology, Hepatology and Nutrition
Instructor of Pediatrics, Harvard Medical School

Nurse Practitioners

Psychologists

Ryan Davidson, PhD

Ryan Davidson , PhD

Attending Psychologist, Division of Gastroenterology, Hepatology and Nutrition
Instructor of Psychology in the Department of Psychiatry, Harvard Medical School

Clinical Nutrition Specialists

Speech-Language Pathologists

Social Work