Education and Training

Medical School

MD - Alpert Medical School of Brown University, Providence, RI

Residency

Pediatrics - Rainbow Babies and Children's Hospital, Cleveland, OH

Fellowship

Gastroenterology - The Children's Hospital of Philadelphia, Philadelphia, PA

Board Certification

Pediatrics

Titles and Academic Titles

Gastroenterologist

Assistant Professor of Clinical Pediatrics, Perelman School of Medicine at the University of Pennsylvania

Conditions Treated

Departments and Services

Publications

Papers

2018

Sahn B, De Matos V, Stein R, Ruchelli E, Masur S, Klink AJ, Baldassano RN, Piccoli DA, Russo P, Mamula P.: Histological features of ileitis differentiating pediatric Crohn disease from ulcerative colitis with backwash ileitis. Digestive and Liver Disease 50(2): 147-153, February 2018.

Stein R, Plantz K, Maxwell EC, Mamula P, Baldassano RN: Intravenous iron sucrose for treatment of iron deficiency anemia in pediatric inflammatory bowel disease. Journal of Pediatric Gastroenterology and Nutrition 66(2): e51-e55, February 2018.

2016

Conrad MA*, Stein RE*, Maxwell EC, Albenberg L, Baldassano RN, Dawany N, Grossman AB, Mamula P, Piccoli DA, Kelsen JR.  Vedolizumab in severe pediatric inflammatory bowel disease. Inflamm Bowel Dis. 2016 Oct;22(10):2425-31. *Co-first authorship

Stein R, Lee D, Leonard MB, Thayu M, Denson LA, Chuang E, Herskovitz R, Kerbowski T, Baldassano RN. Serum infliximab, anti-drug antibodies, and tumor necrosis factor predict sustained response in pediatric Crohn disease. Inflamm Bowel Dis. 2016 June;22(6):1370-7. 

2015

Stein R, Chelimsky T, Li H, Chelimsky G: Functional gastrointestinal disorders in a primary care clinic. Global Pediatric Health 2: 1-9, 2015 Notes:  doi: 10.1177/2333794X14568452.

Hamdy RF, Stein RE, Larru B, Bellah RD, Grossman AB, Hodinka RL, Feemster KA: Gallbladder wall thickening in an adolescent with acute mononucleosis: A case report and brief review of the literature. J Ped Infect Dis  4(3): 267-271, September 2015.

Abstracts

2019

Stein R, Kachelries K, Sigall-Boneh R, Feigenbaum K, Weston S, Baldassano R, Levine A. Biological and immunomodulator withdrawal in pediatric Crohn’s disease patients in deep clinical remission using the Crohn’s disease exclusion diet. Digestive Disease Week. San Diego, CA. May 2019.

2018

Stein RE, Liu Y, Chen Y, Baldassano RN. A comparison of infliximab monotherapy and concomitant immunomodulator therapy in pediatric Crohn disease. North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition Annual Meeting. Fort Lauderdale, FL. October 2018.

Fusillo S, Chang V, Stein RE, Maxwell EC, Conrad MA, Albenberg L, Grossman AB, Mamula P, Piccoli D, Baldassano RN, Kelsen JR. Ustekinumab responders versus non-responders in refractory pediatric inflammatory bowel disease. Digestive Disease Week. Washington, DC. June 2018.

Books

Chapters

2020

Stein RE and Baldassano RN: Eosinophilic gastroenteritis. Nelson Textbook of Pediatrics. Kleigman RM, St Geme JW, Shah SS, Tasker RC, Wilson KM (eds.) Elsevier, 21st edition: 1987, 2020.

Stein RE and Baldassano RN: Inflammatory bowel disease. Nelson Textbook of Pediatrics. Kleigman RM, St Geme JW, Shah SS, Tasker RC, Wilson KM (eds.) Elsevier, 21st edition: 1973-86, 2020.

2017

Stein RE and Baldassano RN: Dietary therapies for inflammatory bowel disease. Pediatric Inflammatory Bowel Disease. Mamula, P., Grossman, A.B., Baldassano, R.N., Kelsen, J.R., Markowitz, J.E (eds.). Springer, 3rd edition: 473-483, 2017.

Posters and Presentations

2016

Stein R and Kelsen J.  2016.  The heterogeneous presentation of pancreatitis in pediatric inflammatory bowel disease. Abstract for poster presentation at World Congress of Pediatric Gastroenterology, Hepatology, and Nutrition. Montreal, Canada.

Awards and Honors

2016, Research Poster Day Award, The Children’s Hospital of Philadelphia

2013, Science Day Resident Research Award, Rainbow Babies and Children's Hospital

2013, Third-Year Resident Teacher of the Year Award, Rainbow Babies and Children's Hospital

2012, Second-Year Resident Teacher of the Year Award, Rainbow Babies and Children's Hospital

​2011, First-Year Resident Teacher of the Year Award, Rainbow Babies and Children's Hospital

Leadership and Memberships

Memberships in Professional Organizations

2013-present, North American Society for Pediatric Gastroenterology, Hepatology and Nutrition

2013-present, Crohn's & Colitis Foundation of America

2013-present, American Gastroenterological Association