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The Digestive Diseases and Nutrition Center works to prevent, diagnose and treat gastrointestinal, nutritional, hepatic and pancreatic disease in children from birth through young adulthood.

We specialize in the diagnosis and treatment of nutritional problems, gastrointestinal problems, (including inflammatory bowel disease, reflux disease, diarrhea, constipation and peptic diseases) and liver diseases (including hepatitis B and C, autoimmune hepatitis, fatty liver diseases, metabolic liver diseases, preparation for transplant and follow-up after transplant).

Our faculty makes up the Digestive Diseases and Nutrition Center (DDNC), established in 1976 as one of the first centers in the United States for the treatment of children with gastrointestinal and nutritional problems.

Education and Training

Our Division is actively involved in the education of both residents and medical students. Our fellows play an integral role in educating these rotating trainees.


We sponsor an Accreditation Council of Graduate Medical Education (ACGME)-accredited fellowship training program. Two fellows per year are accepted into our three-year program.


Residents in the gastroenterology rotation observe and perform procedures, perform consultations on hospitalized children, and attend clinic sessions.


Our faculty conduct basic and clinical research, publish and contribute to national policy. We are committed to work that will uncover the causes of diseases, find treatments for diseases and study the effect of medications on diseases. Our research program is focused on molecular immunology.

Ongoing research projects include:

  • Mechanism and regulation of gastric acid secretion
  • Using gastric parietal cell model to study general cell biology
  • Pathogenesis of nonalcoholic steatohepatitis (NASH)
  • Pathogenesis of inflammatory bowel diseases (IBD)

Learn about our research laboratory >

Patient Care

We manage a consultative service and provide care for the 5,000 patients seen in our clinic each year. The inpatient census runs from 10 to 19 patients, with 600 new patient evaluations yearly.

Providing pediatric gastroenterology services and procedures on an outpatient basis, including:

  • 24 pH Impedance
  • Anorectal Manometry
  • Capsule Endoscopy
  • Colonoscopy and Preps
  • Esophageal Manometry
  • Liver Biopsy
  • Percutaneous Gastrostomy Tube Placement and Management
  • Rectal Suction Biopsy
  • Upper Endoscopy
  • Nutritional Counseling (for under and overweight children)


Division of Gastroenterology
219 Bryant Street
Buffalo, NY 14222
Phone: (716) 878-7793
Fax: (716) 888-3842

Clinic Locations

University Commons
1404 Sweet Home Road
Suite 5
Amherst, NY 14228

Monday: 8:30 a.m. to 3:30 p.m.
Thursday: 8:30 a.m. to 3:30 p.m.

Southwestern Office Park

4535 Southwestern Blvd.
Suite 712
Hamburg, NY 14075

Tuesday: 8:30 a.m. to 11:30 a.m.
Wednesday: 8:30 a.m. to 3:30 p.m.

Women and Children’s Hospital of Buffalo
Pediatric Outpatient Center
140 Hodge Avenue
Buffalo, NY 14222

Wednesday: 8:30 a.m. to 11:30 a.m.

Leader/Division Chiefs


Baker, Susan
Susan Baker, MD, PhD
Professor and Co-Chief, Digestive Diseases and Nutrition Center


Baker, Robert
Robert Baker, MD, PhD
Professor and Co-Chief, Digestive Diseases and Nutrition Center


Alkhouri, Razan
Razan Alkhouri, MBBS
Clinical Assistant Professor

Moya, Diana
Diana Moya, MD
Clinical Assistant Professor

Nugent, Colleen
Colleen Nugent, MD, MS
Clinical Assistant Professor

Zhu, Lixin
Lixin Zhu, PhD
Assistant Professor