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Ronen Stein, MD

About Ronen Stein, MD

Titles

Gastroenterologist

Associate Professor of Clinical Pediatrics (Gastroenterology, Hepatology and Nutrition), Perelman School of Medicine at the University of Pennsylvania

Certifications

Pediatric Gastroenterology – American Board of Pediatrics

Pediatrics – American Board of Pediatrics

Awards and Honors

2021-2023, GI Fellows' Teaching Award Honor Roll, Children's Hospital of Philadelphia
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

International

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

National

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

Editorial and Academic Positions

Editorial Positions

2020-present, Peer Reviewer, Pharmacoepidemiology and Drug Safety
2020-present, Peer Reviewer, Journal of Pediatric Gastroenterology and Nutrition

Academic and Institutional Committees

2019-present, Pediatric GI Fellowship Program Evaluation Committee

Education & training

Medical Degree

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

Team affiliations

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Publications

Publications

2023

Atia O, Shavit-Brunschwig Z, Mould DR, Stein R, Matar M, Aloi M, Ledder O, Focht G, Urlep D, Hyams J, Broide E, Weiss B, Levine J, Russell RK, Turner D: Outcomes, dosing and predictors of vedolizumab treatment in children: results from the prospective, multi-center VEDOKIDS study. The Lancet Gastroenterology & Hepatology 8(1): 31-42, January 2023.

Zhou Y, Shi J, Stein R, Liu X, Baldassano RN, Forrest CB, Chen Y, Huang J: Missing data matter: an empirical evaluation of the impacts of missing EHR data in comparative effectiveness research. Journal of the American Medical Informatics Association 30(7): 1246-1256, June 2023.

Crisci M, Vellanki S, Baldassano RN, Chen Y, Liu Y, Stein R, Hatch-Stein J: Growth hormone use in pediatric inflammatory bowel disease. J Pediatr Endocrinol Metab Epub. Ahead of Print, October 2023.

2022

Chen A, Stein R, Baldassano RB, Huang J: Learning longitudinal patterns and subtypes of pediatric Crohn disease treated with infliximab via trajectory cluster analysis. Journal of Pediatric Gastroenterology and Nutrition 74(3): 383-388, March 2022.

Atia O, Pujol-Muncunill G, Navas-Lopez VM, Orlanski-Meyer E, Ledder O, Lev-Tzion R, Focht G, Shteyer E, Stein R, Aloi M, Russell RK, Martin-de-Carpi J, Turner D: Children included in randomized clinical trials of biologics in inflammatory bowel diseases do not represent the real-world patient mix. Alimentary Pharmacology and Therapeutics 56(5): 794-801, September 2022.

Constant BD, Baldassano R, Kirsch J, Mitchel EB, Stein R, Albenberg L: Tofacitinib salvage therapy for children hospitalized for corticosteroid- and biologic-refractory ulcerative colitis. Journal of Pediatric Gastroenterology and Nutrition 75(6): 724-730, December 2022.

2021

Moore H, Dubes L, Fusillo S, Baldassano RN, Stein R: Tofacitinib therapy in children and young adults with pediatric-onset medically-refractory inflammatory bowel disease. Journal of Pediatric Gastroenterology and Nutrition 73(3): e57-e62, September 2021.

2019

Conrad MA, Stein RE, Maxwell EC, Albenberg L, Baldassano RN, Dawany N, Grossman AB, Mamula P, Piccoli DA, Kelsen JR: Vedolizumab therapy in severe pediatric inflammatory bowel disease. Inflammatory Bowel Diseases 22(10): 2425-2431, October 2019.

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.

Editorials, Reviews, Chapters
2023

Ronen E Stein, Sudha Anupindi, and Robert N Baldassano: Inflammatory Bowel Disease. Nelson Textbook of Pediatrics 22nd edition, 2023 Notes: Chapter.

Ronen Stein and Robert Baldassano: Eosinophilic Gastroenteritis. Nelson Textbook of Pediatrics 22nd edition, 2023 Notes: Chapter.

2021

Stein RE and Mascarenhas MR: Nutrition in inflammatory bowel disease. Nutrición en Pediatría. Adriana Fernandez and Debora Setton (eds.). Ed Panamericana, 2nd edition, 2021 Notes: Chapter.

Stoner N, Stein RE: 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.). 4th Edition , 2021 Notes: Chapter.

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.

Patient experience rating

(based on 158 submissions)
  • Provider listened carefully
    5.0 of 5
  • Trust provider with care
    4.9 of 5
  • Provider gave enough info about child's health
    4.9 of 5
  • Would recommend the provider
    4.9 of 5
Learn about the patient experience rating system

Comments

  • Excellent service! A truly outstanding professional.
    5 of 5
    Aug 18, 2026

  • We came for a second opinion and we were so impressed with how well prepared the medical team was about my son's medical history, recent diagnosis and proposed treatment. They also spent a lot of time with us and continuously asked and made sure all of our questions and concerns were addressed.
    5 of 5
    Aug 18, 2026

  • Dr. Stein has always been very attentive and supportive about my daughters care. He goes above and beyond, he listens to every concern I have. Honestly everyone at CHOP has been and are so welcoming and nice. Thank you for treating my daughter with such kindness.
    5 of 5
    Aug 13, 2026

  • Dr. Stein is probably the one doctor that I feel most comfortable with seeing my son. He always takes time out to answer the questions without rushing. He never makes us feel like he's rushing to get us out of the room. If I send my chart messages, it's crazy how quickly he responds to them. He's got a great team and I completely appreciate all those there.
    4 of 5
    Aug 10, 2026

  • One of the best doctors my son has ever had. He's caring, he's understanding, he's knowledgeable, he knows his patients, and just really the best doctor ever.
    5 of 5
    Jul 31, 2026

  • Excellent service!!
    5 of 5
    Jul 31, 2026

  • Dr Stein and all staff are excellent.
    5 of 5
    Jul 30, 2026

  • He is always very patient and listens to all my questions and concerns for my child. He is a very caring Dr who makes my child feel safe and understood with all her medical concerns.
    5 of 5
    Jul 30, 2026

  • Dr. Robin Stein is the absolute best. My daughter is very comfortable and happy with him.
    5 of 5
    Jul 27, 2026

  • Dr. Stein was amazing and one of my favorite doctors that I've ever come encounter with. I'm 39 years old and he's probably my absolute favorite. I would highly recommend him. He was amazing.
    5 of 5
    Jul 24, 2026

  • This provider is very knowledgeable, patient, and exceptional customer service when listening to any issues we have currently. He's also really good with note-taking and takes every matter seriously and gives us all options available for whatever issues we're dealing with. We highly recommend him.
    5 of 5
    Jul 24, 2026

  • Dr. Stein has always been wonderful with us. He's always very personable and he contacts you directly and he's very thorough and I would recommend him to anybody that has a GI issue.
    5 of 5
    Jul 21, 2026

  • Dr. Stein always listens and I believe that he truly cares about my child and I appreciate everything that he has done for him and we would recommend him to anyone.
    5 of 5
    Jul 16, 2026

  • Dr. Stein explained things in a manner that made my tween son comfortable and made it easy for someone without a medical background easy to understand.
    5 of 5
    Jul 16, 2026

  • Dr Stein is a phenomenal doctor who goes above and beyond for his patients. He's very responsive, listens well, takes our concerns seriously, collaborates with other CHOP doctors in my child's care, and is willing to think outside the box to find any way possible to help my child. I'm so appreciative for his hard work in trying to figure out my child's GI issues and to provide the best possible care for him.
    5 of 5
    Jul 14, 2026

  • Excellent service.
    5 of 5
    Jul 10, 2026

  • Stein is the best doctor anyone in our family has ever had. Very thorough and caring. He changed my sons life.
    5 of 5
    Jul 09, 2026

  • Dr. Stein is the absolute best. He listens, he takes his time, even though, and he is always on time. I've never waited for him. He gets back to you if you send a message through the portal. He's just about as perfect of a doctor as you can ask for. He's amazing.
    5 of 5
    Jun 26, 2026

  • Dr. Stein always goes above and beyond with every question we always have. He's always willing to answer anything.
    5 of 5
    Jun 26, 2026

  • Dr. Stein has been my son's provider for almost two years. Every appointment we have with Dr. Stein, he thoroughly goes over my child's health, asking questions, allowing us as a family to ask questions, my son as a patient asks questions. He then responds back and to ensure that we understand everything fully, and he devotes that appointment time completely to my child and is fully engaged. We really do appreciate Dr. Stein's service and treatment of my son.
    5 of 5
    Jun 03, 2026
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About the Patient Experience Rating System

The patient experience rating is an average of all responses to the care provider-related questions from surveys submitted by patient families and verified by our survey partner National Research Corporation (NRC Health), an independent company that specializes in patient experience. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question. Responses are measured using percent positive scoring. Percent positive is the percentage of respondents who answered with the most desirable response. We are committed to transparency and sharing the voices of our patients and families. Comments are reviewed before posting to ensure accuracy, privacy, and relevance. To provide meaningful feedback, comments are displayed on provider profiles once a sufficient number have been received. All feedback is also shared internally to support learning, recognition, and continuous improvement. The comments reflect the experiences and perspectives of the patients and families who submitted them. The comments are not endorsed by and do not reflect the views of Children’s Hospital of Philadelphia.