Education and Training

Medical School

MD - Drexel University College of Medicine, Philadelphia, PA


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


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

Board Certification

Pediatric Gastroenterology – American Board of Pediatrics
Pediatrics – American Board of Pediatrics

Graduate Degree

MS in Human Nutrition - Columbia University College of Physicians and Surgeons, New York, NY

Titles and Academic Titles


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

Conditions Treated

Departments and Services

Research Interests

Inflammatory bowel disease

Very early onset inflammatory bowel disease





Rudra S, Shaul E, Conrad M, Patel T, Moore A, Dawany N, Canavan MC, Sullivan KE, Behrens E, Kelsen J.: Ruxolitinib: Targeted Approach for Treatment of Autoinflammatory Very Early Onset Inflammatory Bowel Disease. Clinical Gastroenterology and Hepatology 20(6): 1408-10, June 2022.

Kelsen J, Dawany N, Conrad M, Patel T, Devoto M, Maurer K, Sullivan KE. : Clinical and laboratory predictors of monogenic very early onset inflammatory bowel disease. Clin Immunol. Jul 2022.


Judith R Kelsen 1, Noor Dawany 2, Maire A Conrad 1, Tatiana A Karakasheva 1, Kelly Maurer 3, Jane M Wei 1, Selen Uman 4, Maiah H Dent 1, Rithika Behera 1, Laura M Bryant 1, Xianghui Ma 1, Leticia Moreira 5, Priya Chatterji 6, Rawan Shraim 1, Audrey Merz 1, Rei Mizuno 7, Lauren A Simon 1, Amanda B Muir 1, Claudio Giraudo 8, Edward M Behrens 9, Kelly A Whelan 10, Marcella Devoto 11 12, Pierre A Russo 13, Sarah F Andres 14, Kathleen E Sullivan 3, Kathryn E Hamilton 1: Colonoids From Patients With Pediatric Inflammatory Bowel Disease Exhibit Decreased Growth Associated With Inflammation Severity and Durable Upregulation of Antigen Presentation Genes. Inflammatory Bowel Diseases 27(2): 256-67, January 2021.

Patel T, Henrickson SE, Moser EK, Field NS, Maurer K, Dawany N, Conrad M, Bunin N, Freedman JL, Heimall J, Arnold DE, Wang J, Markowitz JE, Payne-Poff SB, Williams KW, Russo PA, Wherry EJ, Devoto M, Oliver P, Sullivan KE, Kelsen JR: Immune dysregulation in human ITCH deficiency successfully treated with hematopoietic cell transplantation. J Allergy Clin Immunol Pract 9(7): 2885-2893, Jul 2021.

Holbein C, Plevinsky J, Patel T, Conrad M, Kelsen JR.: Pediatric Global Health and Gastrointestinal Symptoms in Children with Very Early-Onset Inflammatory Bowel Disease. Journal of Pediatric Psychology 46(7): 747-756, Aug 2021.

Nicholson MR, Hourigan SK, Conrad M, Goyal A, Jensen K, Kelsen J, Kennedy M, Weatherly M, Kahn SA.: Current Challenges in Fecal Microbiota Transplantation for Clostridioides difficile Infection in Children. Am J Gastroenterol 116(9): 1954-1956, Sep 2021.

Dou Y, Maurer K, Conrad M, Patel T, Shraim R, Sullivan KE, Kelsen J: Mucosal Invariant T cells are Diminished in Very Early-Onset Inflammatory Bowel Disease. J Pediatr Gastroenterol Nutr 73(4): 529-536, Oct 2021.

Conrad MA, Kelsen JR: Clostridioides difficile Infection in Pediatric Inflammatory Bowel Disease: A Clinician's Dilemma. Journal of Pediatric Infectious Diseases Society 17(10(Supplement 3)): S41-S45, Nov 2021.


Kelsen JR, Conrad MA, Dawany N, Patel T, Shraim R, Merz A, Maurer K, Sullivan KE, Devoto M: The Unique Disease Course of Children with Very Early Onset Inflammatory Bowel Disease. Inflammatory Bowel Diseases 26(6): 909-18, May 2020.

Bushman FD, Conrad M, Ren Y, Zhao C, Gu C, Petucci C, Kim MS, Abbas A, Downes KJ, Devas N, Mattei LM, Breton J, Kelsen J, Marakos S, Galgano A, Kachelries K, Erlichman J, Hart JL, Moraskie M, Kim D, Zhang H, Hofstaedter CE, Wu GD, Lewis JD, Zackular JP, Li H, Bittinger K, Baldassano R.: Multi-omic Analysis of the Interaction between Clostridioides difficile Infection and Pediatric Inflammatory Bowel Disease. Cell Host Microbe 28(3): 422-433, Sept 2020.

Liang G*, Conrad MA*, Kelsen JR, Kessler LR, Breton J, Albenberg LG, Marakos S, Galgano A, Devas N, Erlichman J, Zhang H, Mattei L, Bittinger K, Baldassano RN, Bushman FD. *Co-First Author: The dynamics of the stool virome in very early onset inflammatory bowel disease. J Crohns Colitis. 14(11): 1600-1610, November 2020.


Conrad MA, Carreon CK, Dawany N, Russo P, Kelsen JR.: Distinct histopathological features at diagnosis of very early onset inflammatory bowel disease. J Crohns Colitis 13(5): 615-625, April 2019.


Rosenbaum DG, Conrad MA, Biko DM, Ruchelli ED, Kelsen JR, Anupindi SA: Ultrasound and MRI predictors of surgical bowel resection in pediatric Crohn disease. Pediatric radiology 47(1): 55-64, Jan 2017.

Raina A, Conrad MA, Sahn B, Sedarat A, Ginsberg GG, Ahmad NA, Chandrasekhara V, Mamula P, Kochman ML: Endoscopic ultrasound with or without fine-needle aspiration has a meaningful impact on clinical care in the pediatric population. Endoscopic ultrasound 6(3): 195-200, May-Jun 2017.

Conrad MA, Dawany N, Sullivan KE, Devoto M, Kelsen JR: Novel ZBTB24 mutation associated with immunodeficiency, centromere instability, and facial anomalies type 2 syndrome identified in a patient with very early onset inflammatory bowel disease. Inflammatory Bowel Diseases 23(12): 2252-2255, Dec 2017.


Conrad MA, Cui Ji, Lin HC: Sertraline-Associated Cholestasis and Ductopenia Consistent with Vanishing Bile Duct Syndrome. The Journal of pediatrics 169(1): 313-5.e1, Feb 2016.

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): 2425-31, Oct 2016.


Enestvedt BK, Tofani C, Lee DY, Abraham M, Shah P, Chandrasekhara V, Ginsberg GG, Long W, Ahmad N, Jaffe DL, Mamula P, Kochman ML: Endoscopic retrograde cholangiopancreatography in the pediatric population is safe and efficacious. Journal of Pediatric Gastroenterology & Nutrition 57(5): 649-54, Nov 2013.


Katz LEL, Jawad AF, Ganesh J, Abraham M, Murphy K, Lipman TH : Fasting c-peptide and insulin-like growth factor-binding protein-1 levels help to distinguish childhood type 1 and type 2 diabetes at diagnosis Pediatric Diabetes 8(2): 53-59, Apr 2007.


Katz LEL, Abraham M, Johansen L, Jawad A : Leptin levels decline steadily during prolonged fasting in lean children. Journal of Pediatrics 149(6): 798-802, Dec 2006.


Katz LEL, Swami S, Abraham M, Murphy KM, Jawad AF, McKnight-Menci H, Berkowitz R: Neuropsychiatric disorders at the presentation of type 2 diabetes mellitus in children. Pediatric Diabetes 6(2): 84-89, Jun 2005.



Conrad MA, Bittinger K, Ren Y, Dawany N, Li H, Baldassano R, Bushman F, Kelsen JR: Taxonomic and metabolic differences among very early onset inflammatory bowel disease, older onset pediatric inflammatory bowel disease, and healthy children NASPGHAN Annual Meeting October  2018.

Conrad MA, Dawany N, Ren Y, Bittinger K, Baldassano R, Bushman F, Devoto M, Kelsen JR.: Genetic influence on developing microbiome in very early onset inflammatory bowel disease. American Gastroenterological Association Digestive Diseases Week  May  2018.


Conrad M, Carreon CK, Kelsen J, Russo P: Features of very early onset compared with older onset inflammatory bowel disease. Inflammatory Bowel Diseases 23(1): S68, February 2017.

Conrad M, Dawany N, Patel T, Sullivan KE, Devoto M, Kelsen JR. : Infliximab infusion reactions in very early onset and pediatric inflammatory bowel disease.  NASPGHAN Annual Meeting  October  2017.

Fusillo S, Olson T, Conrad M, Baldassano R, Grossman A, Kelsen J: Infliximab dose de-escalation in pediatric inflammatory bowel disease: A single-center experience. NASPGHAN Annual Meeting  October 2017.

Galgano A, Dawany N, Conrad MA, Sullivan K, Devoto M, Kelsen JR: Characterization of Infantile Inflammatory Bowel Disease. NASPGHAN Annual Meeting October 2017.


Conrad M, Miller L, Chan V.: Writing the Business Plan for a Life Science Startup. Academic Entrepreneurship for Medical and Health Scientists. Gooneratne, N., McGarrigle, R., and Winston, F (eds.). October 2019 Notes:

Conrad M, Wu G, Kelsen JR: The Gut Microbiota and Inflammatory Bowel Disease. Pediatric Inflammatory Bowel Diseases. Mamula P, Grossman AB, Baldassano R, Kelsen JR, Markowitz (eds.). Springer, 3: 45-54, 2017.


Conrad MA, Hoffman NJF, Maxwell EC, Picoraro JA: Gastroenterology. Pediatric Secrets, 7th edition. Polin R, Ditmar M (eds.). Elsevier, September 2020.


Conrad MA, Maxwell EC: Intestinal Disorders. Nelsons Pediatrics Board Review. Elsevier, Page: 187-200, 2018.


Liacouras C, Wendel D, Jump C, Conrad M, Hoffman N, Maxwell E, Muir A, Waisbourd-Zinman O. Gastroenterology in Polin and Ditmar (2016) Pediatric Secrets, 6th Edition, Philadelphia, PA: Elsevier.

Posters and Presentations


Breton J Tu V, Tanes C, Quinn R, Conrad M, Kachelries K, Bittinger K, Baldassano R, Compher C, Albenberg L: Dietary Inflammatory Potential and Food Patterns in Relation to Gut Microbiome Among Children with Crohn's Disease: A Comparative Study with Healthy Controls North American Society for Pediatric Gastroenterology, Hepatology and Nutrition Annual Meeting, Chicago, IL Nov 2020 Notes: poster.


Conrad MA, Dawany N, Patel T, Carreon CK, Shraim R, Merz A, Russo P, Kelsen J: Early Childhood Inflammatory Bowel Disease is Distinct from Infantile and Pediatric IBD. American Gastroenterological Association Digestive Diseases Week, San Diego, CA May 2019 Notes: poster.

Conrad MA, Ren Y, Bittinger K, Devas N, Zackular J, Li H, Bushman F, Devoto M, Baldassano R, Kelsen J: The Microbial and Metabolic Maturity of Pediatric and Very Early Onset inflammatory bowel disease North American Society of Pediatric Gastroenterology, Hepatology, and Nutrition Annual Meeting, Chicago, IL October 2019 Notes: poster.

Invited Lectures


Conrad M. Very Early Onset Inflammatory Bowel Disease: A Multidisciplinary Approach, LeBonheur Children's Hospital, Memphis TN, virtual. Apr 2022.


Conrad M. "Very Early Onset Inflammatory Bowel Disease" Stony Brook Children's Hospital, Stony Brook, NY. Oct 2021.

Conrad M. "Very Early Onset Inflammatory Bowel Disease" University of Miami School of Medicine Division of Pediatric GI, Miami, FL - Clinical Conference virtual presentation. June 2021.

Conrad M. Clostridioides difficile and fecal microbiota transplant in children, Golisano Children's Hospital, Pediatric GI Conference, Rochester, NY via Zoom. Mar 2021.


Conrad M. Very Early Onset Inflammatory Bowel Disease, St Peters University Hospital Resident Noon Conference, New Brunswick, NJ. Oct 2019.

Conrad M. Updates in Pediatric Inflammatory Bowel Disease, St. Peters University Hospital Visiting Professor Grand Rounds, New Brunswick, NJ. Oct 2019.

Conrad M. The Intestinal Microbiome of Inflammatory Bowel Disease across the Pediatric Age Range, Crohn's and Colitis Congress, Las Vegas, NV. Feb 2019.

Awards and Honors

2020, Pediatric Residency Early Career Faculty Honor Roll, Children's Hospital of Philadelphia
2016, Komorav Competition Gastroenterology Fellow Research Award - 2nd Place
2016-2019, Entrepreneurial Science Scholar, Children's Hospital of Philadelphia
2016, American Gastroenterological Association Early Stage Investigator Award
2015, Salix Pharmaceuticals Fellowship2Leadership GI Fellows' Travel Grant
2010, Alpha Omega Alpha Honor Medical Society, Drexel University College of Medicine

Editorial and Academic Positions

Editorial Positions

Peer Review

2021-present, Pediatric Research
2021-present, Crohn's Colitis 360
2021-present, Scientific Reports
2020-present, BMJ Open Gastroenterology
2019-present, European Journal of Pediatrics

Academic and Institutional Committees

2019-present, GI Scientific Review Committee, Chair

Leadership and Memberships

Memberships in Professional Organizations

2013-present, North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition
 - 2020-present, Co-Chair, Annual Meeting Abstract Sub-Committee,
 - 2019-present, Fecal Microbiota Transplant Special Interest Group
 - 2019-present, Co-Leader, Mentor-Mentee Fellowship Program
 - 2018-present, Research Committee
2013-current, American Gastroenterological Association
2013-current, Crohn’s & Colitis Foundation of America