Meet the Pediatric Gastroenterology Team


William I Muinos, MD

Chief, Department of Pediatric Medicine
Director, Division of Gastroenterology
Director, Weight Management Clinic

Primary Office: Miami

Clinical Interests: Pediatric gastroenterology, Nutritional support, Gastroesophageal reflux, Hepatitis B


Alisa J Muniz Crim, MD

Medical Director, IBD Center

Primary Office: Miami

Additional Office: Miami

Clinical Interests: Pediatric inflammatory bowel disease (IBD), celiac disease, feeding disorders, gastrointestinal dysmotility


John M Peters, DO

Pediatric Specialists of America Northern Regional Chief, Section of Gastroenterology

Primary Office: Palm Beach Gardens

Clinical Interests: Inflammatory bowel disease (IBD), liver disease in children and short-bowel syndrome


Luis F Caicedo Oquendo, MD

Medical Director, Fecal Transplant Program Director-elect, Gastroenterology, Hepatology and Nutrition Fellowship Program

Primary Office: Miami

Additional Offices: Doral, Miami, Palm Beach Gardens

Clinical Interests: Obesity, food allergies, Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome (IBS) and nutrition


Lina Maria Felipez, MD

PSA Director, IBD Research

Primary Office: Miami

Additional Office: Aventura

Clinical Interests: IBD, reflux, constipation, celiac disease, eosinophilic esophagitis


Ruben Gonzalez-Vallina, MD

Director, Gastroenterology Outpatient Initiative
PSA Director, Community GI Initiatives

Primary Office: Miami

Clinical Interests: Pediatric liver transplantation, celiac disease, inflammatory bowel disease and nutrition


Carrie Firestone Baum, MD

Pediatric Gastroenterologist

Primary Office: Boynton Beach

Additional Office: Palm Beach Gardens

Clinical Interests: Gastrointestinal disorders such as functional abdominal pain and constipation, as well as celiac disease, eosinophilic esophagitis and inflammatory bowel disease.


Shifra A Koyfman, MD

Pediatric Gastroenterologist

Primary Office: Miami

Additional Office: Boynton Beach

Clinical Interests: Gastrointestinal (GI) diseases, Inflammatory Bowel Disease (IBD), proctocolitis, milk protein intolerance, acid reflux, celiac disease, abdominal pain


See all Pediatric Gastroenterologists on the Nicklaus Children's Hospital medical staff.

PSA Logo
 A physician identified with a Pediatric Specialists of America (PSA) logo is an employee of PSA, which is part of Nicklaus Children's Health System. All other physicians listed on the website are in private medical practices.