About Jess Kaplan, MD

Dr. Jess Kaplan is an attending physician in the Department of Pediatrics and a Pediatric Gastroenterologist at MassGeneral Hospital for Children. He completed both his residency in pediatrics (2008) and fellowship in pediatric gastroenterology and nutrition (2011) at MassGeneral Hospital for Children.  Dr. Kaplan's clinical interests include inflammatory bowel diseases (IBD) including Crohn's disease and ulcerative colitis, and other immune-mediated and general gastrointestinal disorders.  He sees patients in the Pediatric IBD Program at MGH, MGH West and at Newton Wellesley Hospital. Dr. Kaplan serves as the clinical director of the Pediatric IBD Program and director of IBD Clinical trials at MGHfC, where he conducts clinical and translational research and leads quality improvement initiatives. He has a strong interest in dietary management of IBD and is the clinical lead of the nutritional therapy in IBD program. Dr. Kaplan also leads the Pediatric fecal microbiota transplantation (FMT) program at MGHfC.

Clinical Interests:



Pediatric Gastroenterology and Nutrition
55 Fruit Street
Boston, MA 02114-2696
Phone: 617-726-8705
Phone: 617-726-1450
Fax: 617-724-7011

MGH Cape Cod Forestdale Office
280-D Route 130
Forestdale, MA 02644-1131
Phone: 508-833-1060
Fax: 508-833-2216

Medical Education

  • MD, UMASS Medical School
  • MD, Univ. Mass. Worc. M.S.
  • Residency, Massachusetts General Hospital
  • Fellowship, Massachusetts General Hospital

American Board Certifications

  • Pediatric Gastroenterology, American Board of Pediatrics
  • Pediatrics, American Board of Pediatrics

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


  • View my most recent publications at PubMed

    Moy MP, Kaplan JL, Moran CJ, Winter HS, Gee MS. MR enterography as a biomarker of mucosal healing in young patients with Crohn's disease. AJR Am J Roentgenol. 2016 Jun 28:1-7. [Epub ahead of print].

    Wang F*, Kaplan JL*, Gold BD, Bhasin MK, Ward NL, Kellermayer R, Kirschner BS, Heyman MB, Dowd SE, Cox SB, Dogan H, Steven B, Ferry GD, Cohen SA, Baldassano RN, Moran CJ, Garnett EA, Drake L, Otu HH, Mirny LA, Libermann TA, Winter HS, Korolev KS. Detecting Microbial Dysbiosis Associated with Pediatric Crohn Disease Despite the High Variability of the Gut Microbiota. Cell Rep. 2016;14:945-55.

    Moran CJ, Kaplan JL, Winter HS, Masiakos PT. Occult blood and perianal exam: value added in pediatric inflammatory bowel disease screening. J Pediatr Gastroenterol Nutr. 2015;6:52-55.

    Russell GH, Kaplan JL, Youngster I, Baril-Dore M, Schindelar L, Hohmann E, Winter HS. Fecal transplant for recurrent Clostridium difficile infection in children with and without inflammatory bowel disease. J Pediatr Gastroenterol Nutr. 2014;58(5):588-592. PMID: 24792627

    Koukos G, Polytarchou C, Kaplan JL, Morley-Fletcher A, Gras-Miralles B, Kokkotou E, Baril-Dore M, Pothoulakis C, Winter HS, Iliopoulos D. MicroRNA-124 Regulates STAT3 Expression and is Downregulated in Colon Tissues of Pediatric Patients with Ulcerative Colitis. Gastroenterology. 2013;145(4):842-853.

    Kaplan JL, Walker WA. Early gut colonization and subsequent obesity risk. Curr Opin Clin Nutr Metab Care. 2012;15(3):278-284