Program Faculty

Esther Israel, MD

Interim Division Chief
Quality Chair, Department of Pediatrics

Associate Professor of Pediatrics, Harvard

Clinical Expertise: 

Inflammatory Bowel Disease

Research: 

Quality in IBD

Alessio Fasano, MD

Division Chief, Emeritus

W. Allan Walker Chair in Pediatric Gastroenterology and Nutrition
Director, Center for Celiac Research and Treatment
Director, Mucosal Immunology and Biology Research Center
Associate Chief for Basic, Translational and Clinical Research

Clinical Expertise: 

Celiac disease

Research: 

Pathogenesis and Treatment of Celiac disease

Kriston Ganguli, MD

Clinical Chief

Medical Director of Ambulatory Quality and Safety

Assistant Professor of Pediatrics, HMS

Clinical Expertise: 

Capsule endoscopy

Angelman's syndrome

Research: 

Necrotizing Enterocolitis

Probiotics

Quality

Christopher Moran, MD

GI Fellowship Program Director
Research Director, Pediatric IBD Program

Assistant Professor of Pediatrics, Harvard

Clinical Expertise: 

Inflammatory Bowel Disease

Research: 

VEO-IBD

Biomarkers of IBD

Medical Education

Awab Ali Ibrahim, MD

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Nutrition

Obesity Medicine

Research: 

Impact of Nutrition on Microbiome

Micaela Atkins, MD

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Pediatric Motility Disorders

Research: 

ARFID in GI Diseases

Transition in Care in Neutrogastroenterology

Jeffrey Biller, MD

Director, Pediatric Endoscopy

Assistant Professor of Pediatrics, Harvard

Clinical Expertise: 

Inflammatory Bowel Disease

Tracey DaFonte, MD

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Inflammatory Bowel Disease

Lauren Fiechtner, MD, MPH

Director, Center for Pediatric Nutrition

Associate Professor of Pediatrics, Harvard

Clinical Expertise: 

Nutritional Disorders

Feeding Disorders

Research: 

Prevention and Treatment of Childhood Obesity

Food Scarcity

Kayla Hartjes, MD

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Pediatric Liver Disease

Research: 

Hepatology Simulation

Sarah Kadzielski, MD

Instructor of Pediatrics, Harvard

Clinical Expertise: 

GI Conditions in Patients with Autism

Research: 

Microbiome and Metabolome in Autism

Jess Kaplan, MD

Clinical Director, Pediatric IBD Program
Clinical Lead, Pediatric Fecal Microbial Transplant

Assistant Professor of Pediatrics, Harvard

Clinical Expertise: 

Inflammatory Bowel Disease

Research: 

IBD Clinical Trials

Use of Biologics in IBD

Fecal Microbial Transplantation

Nanda Kerkar, MBBS MD

Medical Director, Pediatric Liver Transplant Program

Clinical Expertise: 

Pediatric Liver Disease

Research: 

Autoimmune Hepatitis

Maureen Leonard, MD, MMSc

Clinical Director, Center for Celiac Disease Research and Treatment

Assistant Professor of Pediatrics, Harvard

Clinical Expertise: 

Celiac Disease

Research: 

Pathogenesis of Celiac Disease

Non-Invasive Biomarkers of Celiac Disease

Victoria Martin, MD, MPH

Associate Fellowship Program Director

Co-Director, Pediatric GI/Allergy

Assistant Professor of Pediatrics, Harvard

Clinical Expertise: 

Food Allergy

Research: 

Development of Infantile Allergic Proctocolitis

Katherine Olshan, MD

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Celiac Disease

Research: 

Novel Therapeutics  in Celiac Disease

Mark Salvatore, MD, MPH

Director, Pediatric Mind-Body Program

Assistant Professor of Pediatrics, Harvard

Clinical Expertise: 

Mind Body Medicine

Navneet Virk Hundal, MD

Co-Director, Pediatric GI/Allergy

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Food Allergy

Research: 

Treatment of Eosinophilic esophagitis

James Reed, MHS, MD

Harland Winter, MD

Director, Pediatric Inflammatory Bowel Disease

Associate Professor of Pediatrics, Harvard

Clinical Expertise: 

Inflammatory Bowel Disease

Research: 

Developing Microbiome in IBD

Genetic Factors in IBD

Qian Yuan, MD, PhD

Associate Professor of Pediatrics, Harvard

Clinical Expertise: 

Food Allergy

Research: 

Eosinophilic GI disorders

Claire Zar-Kessler, MD

Medical Director, Pediatric Neurogastroenterology

Instructor of Pediatrics, Harvard

Clinical Expertise: 

Motility Disorders

Research: 

Pelvic Floor Dyssynergia

Treatment of Functional GI Disorders