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Fellowship in Pediatric Gastroenterology & Nutrition at Cohen Children’s Medical Center

The pediatric gastroenterology and nutrition fellowship program at Cohen Children's Medical Center is a fully accredited fellowship training program. Eight pediatric gastroenterology and nutrition attending physicians provide fellows with the clinical, didactic and research guidance necessary for comprehensive training in the field of pediatric gastroenterology and nutrition. The program provides a progressive educational experience that includes development of procedural skills, responsibility for patient care and participation in research.

During clinical training, time is spent learning the pathophysiology, diagnosis and management of gastrointestinal disease as well as nutritional diagnosis and therapy. In addition, fellows develop expertise as an endoscopist. During the research-training component, fellows develop a protocol, perform the necessary experiments and tabulate and interpret the collected data. Faculty works with trainees to assist in the completion of scholarly activity training requirements. Weekly clinical case conference, educational conference and pathology conference, as well as a CME-approved weekly pediatric gastroenterology grand rounds program are offered. A monthly journal club and the radiology conference in addition to our many multidisciplinary conferences are all part of the educational experience.

After three years of fellowship training, the program educates trainees both in the application of clinical gastroenterology, hepatology and nutrition as well as clinical and/or basic science research. Our goal is to develop a well rounded pediatric gastroenterologist who will be an excellent diagnostician and a superb endoscopist, with a strong commitment toward education and research.

Training location

Cohen Children's Medical Center is part of Northwell Health. The Division of Pediatric Gastroenterology and Nutrition is located at Long Island Jewish Medical Center, which houses the tertiary care children's hospital and a state-of-the-art endoscopy and procedure suite. Ambulatory specialty clinics are located at Cohen Children's Medical Center. Coverage is also provided at North Shore University Hospital, a tertiary care facility of Northwell Health.

Cohen Children’s is dedicated to providing the highest level of care to meet the special needs of children, from premature babies to adolescents.

Learn more about Cohen Children’s

Application process

Applicants interested in the pediatric gastroenterology training program at Cohen Children’s Medical Center should apply through the Electronic Residency Application Service (ERAS). Completion of an ACGME-accredited residency program in general pediatrics is mandatory for admission to this program.

Essential application information includes:

  • Universal application
  • Personal statement
  • At least three (3) letters of recommendation. Letters of recommendation must be less than six (6) months old.
  • USMLE or COMLEX transcript
  • Medical school transcript
  • Updated curriculum vitae
  • Letter of recommendation from program director

Only applicants who have passed USMLE examination STEP 1 and 2 on the first attempt should apply. Only completed applications with all supporting documentation will be reviewed. 


Program director

Toba Aliyah Weinstein, MD

Specialties: Pediatric Gastroenterology

Additional faculty

Michael Joseph Pettei, MD

Chief of Division - CCMC of Pediatrics - Pediatric Gastroenterology,LiverDisease,Nutrition, Long Island Jewish Medical Center

Specialties: Pediatric Gastroenterology, Pediatrics

Samuel Bitton, MD, MS

Specialties: Pediatric Gastroenterology, Pediatrics

Kate Renee Buzzi, MD

Specialties: Pediatric Gastroenterology, Pediatrics

Cindy Anne Haller, MD

Specialties: Pediatric Gastroenterology, Pediatrics

James F. Markowitz, MD

Specialties: Pediatric Gastroenterology, Pediatrics

Ying Lu, MD

Specialties: Pediatric Gastroenterology

Benjamin Aaron Sahn, MD

Specialties: Pediatric Gastroenterology

Toni Marie Webster, DO

Specialties: Pediatric Gastroenterology, Pediatrics