Anthony Lawrence Guerrerio JR, M.D., Ph.D., M.S.

Headshot of Anthony Lawrence Guerrerio JR
  • Director, Very Early Onset Inflammatory Bowel Disease Clinic
  • Associate Professor of Pediatrics


Crohn's Disease, Eosinophilic Esophagitis, Gastroenterology, Inflammatory Bowel Disease (IBD), Nutrition, Pediatric Gastroenterology, Ulcerative Colitis more

Research Interests

Eosinophilic esophagitis; gastroenteritis and colitis; Immunodeficiency; Inflammatory bowel disease more

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Johns Hopkins Pediatrics

Appointment Phone: 443-997-5437
200 N. Wolfe Street
Rubenstein Child Health Building
Baltimore, MD 21287 map


Dr. Anthony Lawrence Guerrerio is an assistant professor of pediatrics at the Johns Hopkins University School of Medicine. His areas of clinical expertise include pediatric gastroenterology and nutrition and inflammatory bowel disease. He is the director of the Very Early Onset Inflammatory Bowel Disease Clinic.

Dr. Guerrerio received his M.D. and Ph.D. from the Johns Hopkins University School of Medicine. He completed his residency in pediatrics and did a fellowship in pediatric gastroenterology at Johns Hopkins and then joined the faculty in 2009. 

His clinical practice focuses on eosinophilic intestinal disease (esophagitis, gastroenteritis and colitis) as well as inflammatory bowel disease—especially in the context of immunodeficiency. He also has a special interest in intestinal problems of those affected by Loeys-Dietz syndrome. more


  • Director, Very Early Onset Inflammatory Bowel Disease Clinic
  • Associate Professor of Pediatrics

Departments / Divisions

Centers & Institutes



  • MD PhD; Johns Hopkins University School of Medicine (2003)


  • Pediatrics; Johns Hopkins University School of Medicine (2006)


  • Pediatric Gastroenterology; Johns Hopkins University School of Medicine (2009)

Board Certifications

  • American Board of Pediatrics (Pediatric Gastroenterology) (2009)
  • American Board of Pediatrics (Pediatrics) (2006)

Research & Publications

Selected Publications

Gorelik M, Narisety SD, Guerrerio AL, Chichester KL, Keet CA, Bieneman AP,Hamilton RG, Wood RA, Schroeder JT, Frischmeyer-Guerrerio PA. “Suppression of the immunologic response to peanut during immunotherapy is often transient.” J Allergy Clin Immunol. 2014 Dec 24. pii: S0091-6749(14)01646-7. doi:10.1016/j.jaci.2014.11.010. [Epub ahead of print] PubMed PMID: 25542883.

Robbins KA, Guerrerio AL, Hauck SA, Henry BJ, Keet CA, Brereton NH, Oh S, Stasinopoulos DM, Wood RA. “Growth and nutrition in children with food allergy requiring amino acid-based nutritional formulas.: J Allergy Clin Immunol. 2014 Dec;134(6):1463-1466.e5. doi: 10.1016/j.jaci.2014.08.053. Epub 2014 Oct 29. PubMed PMID: 25445831.

Frischmeyer-Guerrerio PA, Keet CA, Guerrerio AL, Chichester KL, Bieneman AP, Hamilton RG, Wood RA, Schroeder JT. “Modulation of dendritic cell innate and adaptive immune functions by oral and sublingual immunotherapy.” Clin Immunol. 2014 Nov;155(1):47-59. doi: 10.1016/j.clim.2014.08.006. Epub 2014 Aug 27. PubMed PMID: 25173802; PubMed Central PMCID: PMC4252363.

MacCarrick G, Black JH 3rd, Bowdin S, El-Hamamsy I, Frischmeyer-Guerrerio PA, Guerrerio AL, Sponseller PD, Loeys B, Dietz HC 3rd. “Loeys-Dietz syndrome: a primer for diagnosis and management.” Genet Med. 2014 Aug;16(8):576-87. doi: 10.1038/gim.2014.11. Epub 2014 Feb 27. PubMed PMID: 24577266; PubMed Central PMCID: PMC4131122.

Frischmeyer-Guerrerio PA, Guerrerio AL, Oswald G, Chichester K, Myers L, Halushka MK, Oliva-Hemker M, Wood RA, Dietz HC. “TGFβ receptor mutations impose a strong predisposition for human allergic disease.” Sci Transl Med. 2013 Jul 24;5(195):195ra94. doi: 10.1126/scitranslmed.3006448. PubMed PMID: 23884466; PubMed Central PMCID: PMC3905327.

Guerrerio AL, Colvin RM, Schwartz AK, Molleston JP, Murray KF, Diehl A, Mohan P, Schwimmer JB, Lavine JE, Torbenson MS, Scheimann AO. “Choline intake in a large cohort of patients with nonalcoholic fatty liver disease.” Am J Clin Nutr. 2012 Apr;95(4):892-900. doi: 10.3945/ajcn.111.020156. Epub 2012 Feb 15. PubMed PMID: 22338037; PubMed Central PMCID: PMC3302364.

Guerrerio AL, Mattis L, Conner KG, Hampsey J, Stasinopoulos DM, DeJong R, Boctor EM, Sheth S, Hamper UM, Scheimann AO. “Oral choline supplementation in children with intestinal failure.” J Pediatr Gastroenterol Nutr. 2011 Jul;53(1):115-9. doi: 10.1097/MPG.0b013e31821404d4. PubMed PMID: 21694550.

Frischmeyer-Guerrerio PA, Montgomery RA, Warren DS, Cooke SK, Lutz J, Sonnenday CJ, Guerrerio AL, Dietz HC. “Perturbation of thymocyte development in nonsense-mediated decay (NMD)-deficient mice.” Proc Natl Acad Sci U S A. 2011 Jun 28;108(26):10638-43. doi: 10.1073/pnas.1019352108. Epub 2011 Jun 13. PubMed PMID:21670277; PubMed Central PMCID: PMC3127929.

Guerrerio AL, Frischmeyer-Guerrerio PA, Lederman HM, Oliva-Hemker M. “Recognizing gastrointestinal and hepatic manifestations of primary immunodeficiency diseases.” J Pediatr Gastroenterol Nutr. 2010 Nov;51(5):548-55. doi: 10.1097/MPG.0b013e3181efe56b. Review. PubMed PMID: 20871412.

Guerrerio AL, Berg JM. “Design of single-stranded nucleic acid binding peptides based on nucleocapsid CCHC-box zinc-binding domains.” J Am Chem Soc. 2010 Jul 21;132(28):9638-43. doi: 10.1021/ja910942v. PubMed PMID: 20586464; PubMed Central PMCID: PMC2990226.

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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