Weight Loss Surgery Care Team

The expert members of our Adolescent Weight Loss Surgery Team are leaders in the medical field and are passionate about providing the best care.

Surgeons

Matias Bruzoni

Matias Bruzoni, MD, is the surgical director of the Adolescent Weight Loss Surgery program and he is the program director for the Pediatric Fellowship program. Dr. Bruzoni is board certified in Pediatric and Adult Surgery.

Areas of Expertise: minimally invasive surgery, neonatal surgery, surgical oncology, health outcomes in the Hispanic population 

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Janey Pratt, MD, is a clinical instructor.

Areas of Expertise: minimally invasive surgery, bariatric surgery

 Stephanie Chao

Stephanie Chao, MD, is board certified in Pediatric and Adult Surgery.

Areas of Expertise: minimally invasive surgery, neonatal surgery, chest wall deformities, trauma, health outcomes in the Asian population

James Wall

James K. Wall, MD, is board certified in Pediatric and Adult Surgery.

Area of Expertise: minimally invasive surgery, neonatal surgery, medical device technology and innovation, endoscopic procedures

Bariatric Medicine

Elizabeth Shepard

Elizabeth Shepard, MD, serves as medical director of the Pediatric Weight Clinic. She is board certified in Pediatrics, Nutrition and Obesity.

Areas of Expertise: obesity, clinical nutrition, environmental health

Lawrence Hammer

Lawrence Hammer, MD, serves as medical director for the Center for Healthy Weight. He is board certified in Pediatrics.

Areas of Expertise: childhood obesity, eating behavior, obesity evaluation and management

Sophia Yen, MD, is board certified in Pediatrics and Adolescent Medicine.

Areas of Expertise: childhood obesity, obesity evaluation and management

Social Worker

Amy Valentine

Amy Valentine, LCSW, is a licensed clinical social worker who works in the Department of Adolescent Medicine.

Areas of Expertise: eating disorders, adolescent weight loss, adolescent gynecology

Nutritionist / Program Coordinator

Elizabeth Cotter

Elizabeth Cotter, RD, is a registered dietician.

Areas of Expertise: clinical nutrition