
Highlights
Johns Hopkins Affiliations:
- Johns Hopkins School of Medicine Faculty
About Joanna Miller Peloquin Melia
Primary Academic Title
Associate Professor of Medicine
Johns Hopkins Physician
Background
Dr. Melia specializes in inflammatory bowel disease (IBD), and her clinical expertise includes ulcerative colitis, Crohn’s disease, microscopic colitis, collageneous colitis and Celiac disease. Her primary research interest is improving approaches for individualized care for patients with IBD through functional genomic studies, particularly related to diet, host, and microbiota interactions.
She has authored numerous peer-reviewed publications.
Centers and Institutes
Find a Clinical Trial
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Recent News Articles and Media Coverage
Unlocking the Genetic Mysteries of IBD, Inside Tract (Spring 2017)
Lab Website
Joanna Melia Lab
- The performs basic, translational, and clinical research on Zinc metabolism and inflammatory bowel disease.
PubMed - Publications
Selected Publications
- Pringle PL, Stewart KO, Peloquin JM, Sturgeon HC, Nguyen D, Sauk J, Garber JJ, Yajnik V, Ananthakrishnan AN, Chan AT, Xavier RJ, Khalili H. Body mass index, genetic susceptibility, and risk of complications among individuals with Crohn’s disease. Inflamm Bowel Dis. 2015 Jul 15. [Epub ahead of print]
- Letner D, Peloquin JM, Durand J, Rutherford A, Yajnik V, Khalili H, Garber J. Elevated total iron-binding capacity is associated with an increased risk of Celiac disease. Dig Dis Sci. 2015 Jul 15. [Epub ahead of print]
- Lassen KG, Kuballa P, Conway KL, Patel KK, Becker CE, Peloquin JM, Villablanca EJ, Normal JM, Liu TC, Heath RJ, Becker ML, Fagbami L, Horn H, Mercer J, Yilmaz OH, Jaffe JD, Shamiji FG, Bhan AK, Carr SA, Daly MJ, Virgin HW, Schreiber SL, Stappenbeck TS, Xavier RJ. Atg16L1 T300A variant decreases selective autophagy resulting in altered cytokine signaling and decreased antibacterial defense. Proc Natl Acad Sci U S A. 2014 May 27;111(21):7741-6. Epub 2014 May 12.
- Shaw SY, Tran K, Castoreno AB, Peloquin JM, Lassen KG, Khor B, Aldrich LN, Tan PH, Graham DB, Kuballa P, Goel G, Daly MJ, Shamji AF, Schreiber SL, Xavier RJ. Selective modulation of autophagy, innate immunity, and adaptive immunity by small molecules. ACS Chem Biol. 2013 Dec 20;8(12):2724-33. Epub 2013 Oct 29.
- Conway KL, Kuballa P, Song JG, Patel KK, Castoreno AB, Yilmaz OH, Jijon HB, Zhang M, Aldrich LN, Villablanca EJ, Peloquin JM, Goel G, Lee IA, Mizoguchi E, Shi HN, Bhan AK, Shaw SY, Schreiber SL, Virgin HW, Shamji AF, Stappenbeck TS, Reinecker HC, Xavier RJ. Atg16l1 is required for autophagy in intestinal epithelial cells and protection of mice from Salmonella infection. Gastroenterology. 2013 Dec;145(6):1347-57. Epub 2013 Aug 21.
- Peloquin JM and Nguyen DD. The microbiota and inflammatory bowel disease: Insights from disease models. Anaerobe. 2013 Dec;24:102-6. Epub 2013 Apr 17.
- Nguyen-Trong PK, Peloquin JM, Lauder NN, Nayor JA, Gelber AC. More than skin deep. J Gen Intern Med. 2013 Feb;28(2):315-9.
- McElhiney J, Lohse MR, Arora AS, Peloquin JM, Geno DM, Kuntz MM, Enders FB, Fredericksen M, Abdalla AA, Khan Y, Talley NJ, Diehl NN, Beebe TJ, Harris AM, Farrugia G, Graner DE, Murray JA, Locke GR 3rd, Grothe RM, Crowell MD, Francis DL, Grudell AM, Dabade T, Ramirez A, Alkhatib M, Alexander JA, Kimber J, Prasad G, Zinsmeister AR, Romero Y. The Mayo Dysphagia Questionnaire-30: documentation of reliability and validity of a tool for interventional trials in adults with esophageal disease. Dysphagia. 2010 Sep;25(3):221-30.
- Varkey P, Peloquin JM, Reed D, Lindor K, Harris I. Leadership curriculum in undergraduate medical education: a study of student and faculty perspectives. Med Teach. 2009 Mar;31(3):244-50.
- Peloquin JM, Pardi DS, Sandborn WJ, Fletcher JG, McCollough CH, Schueler BA, Kofler JA, Enders FT, Achenbach SJ, Loftus EV Jr. Diagnostic ionizing radiation exposure in a population-based cohort of patients with inflammatory bowel disease. Am J Gastroenterol. 2008 Aug;103(8):2015-22.
- Sahoo T, Goenaga-Diaz E, Serebriiskii IG, Thomas JW, Kotova E, Cuellar JG, Peloquin JM, Golemis E, Beitinjaneh F, Green ED, Johnson EW, Marchuk DA. Computational and experimental analyses reveal previously undetected coding exons of the KRIT1 (CCM1) gene. Genomics. 2001 Jan;71(1):123-126.
Honors
- Top Doctor, Baltimore Magazine, 1/1/20
- Salix Fellow's Program Travel Grant, Fellowship2Leadership, 1/1/14
- Fellows Award for Excellence in Clinical Teaching in Medicine, Massachusetts General Hospital, 1/1/11
- American Gastroenterology Association Student Research Fellowship, American Gastroenterology Association, 1/1/06
Locations
- Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville
- 2360 West Joppa Road, Joppa Concourse STE 205, Lutherville, MD 21093
- Get Directions
- phone: 410-933-7495
- fax: 410-616-7351
Expertise
Education
- Fellowship: Massachusetts General Hospital, Gastroenterology, 2015
- Fellowship: Massachusetts General Hospital, Gastroenterology, 2011
- Residency: Johns Hopkins University School of Medicine, Medicine, 2010
- Medical Education: Mayo Clinic College of Medicine, MD, 2007
Board Certifications
- Gastroenterology: American Board of Internal Medicine, 2014
Insurance
- Aetna
- CareFirst
- Cigna
- First Health
- Geisinger Health Plan
- HealthSmart/Accel
- Johns Hopkins Health Plans
- MultiPlan
- Pennsylvania's Preferred Health Networks (PPHN)
- Point Comfort Underwriters
- Private Healthcare Systems (PHCS)
- Veteran Affairs Community Care Network (Optum-VACCN)
Ratings & Reviews
5 out of 5
44 ratings, 24 reviewsThe 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.
- 5 out of 5 starsReviewed on 3/19/2026
Dr. Melia listened and we discussed options to help with my situation. She was very helpful and kind.
- 5 out of 5 starsReviewed on 3/5/2026
Dr. Melia is the best. She is professional, caring, listens, helps. I could not ask for a better GE physician. She follows up with MyChart conversations/questions.I am fortunate to have her caring for me.
- 5 out of 5 starsReviewed on 3/5/2026
Dr Melia is an excellent Provider. She is very knowledgeable and respectful.
- 5 out of 5 starsReviewed on 3/5/2026
Can easily talk to her.
- 5 out of 5 starsReviewed on 2/26/2026
Dr Joanna Miller Peloquin Melia is fantastic. Very professional and knowledgeable. Took care of all of my concerns. Would highly recommend this provider.
- 5 out of 5 starsReviewed on 2/19/2026
Dr Melia was very knowledgeable, compassionate, and professional. She spent sufficient time with me and addressed all my concerns and issues dealing with UC. She is truly an asset to John Hopkins. I'm so thankful to [staff] for her recommendation.
- 5 out of 5 starsReviewed on 1/22/2026
She's great
- 5 out of 5 starsReviewed on 1/22/2026
Dr Melia is the best. She is professional and caring. She knows her field and can explain issues with me so I easily understand. She continues to take excellent care of me. I am grateful to have her as my gastroenterologist! Thank you
- 5 out of 5 starsReviewed on 1/8/2026
Extremely knowledgeable, engaging and professional
- 5 out of 5 starsReviewed on 12/18/2025
Dr. Melia is very thorough, respectful, warm and easy to talk to.
- 5 out of 5 starsReviewed on 12/18/2025
Always very helpful and informative. Genuinely cares about you as a patient.
- 5 out of 5 starsReviewed on 12/18/2025
Dr. Melia and the resident had a thorough discussion with me about recent medical issues and the need for lab work and an upcoming colonoscopy. They listened intently to my concerns about health issues. I appreciate that we discussed some possible medication changes to improve my intestinal health and functioning.
- 5 out of 5 starsReviewed on 12/18/2025
Incredible listener, knowledgeable, caring. Love her!!!!
- 5 out of 5 starsReviewed on 12/4/2025
She is very helpful and listens to my concerns.
- 5 out of 5 starsReviewed on 10/16/2025
Dr. Melia is amazing. Very thorough and breaks things down into layman's terms. I've been seeing her for over 9 years for my IBD, and she has always had answers to my questions and issues.
- 5 out of 5 starsReviewed on 9/11/2025
Superior as always: explains her thinking, treats me as intelligent person involved in my own care. Welcomes questions.
- 5 out of 5 starsReviewed on 9/11/2025
Dr Melia is the best. She cares about me and has resolved a difficult problem. I am most grateful. She is professional and knowledgeable. I am a fortunate patient. She deserves kudos! Thank you.
- 5 out of 5 starsReviewed on 9/4/2025
The best.
- 5 out of 5 starsReviewed on 9/4/2025
I was very pleased. Doctor did her homework and knew my long history with my Colitis and Crohn disease. Other than this disease, I feel healthy. Eat well and exercise. Current medication is working perfectly.
- 5 out of 5 starsReviewed on 8/28/2025
Excellent Doctor and person
- 5 out of 5 starsReviewed on 7/24/2025
She's the best!! I feel very well cared for and the impact she has made on my health has been incredible!
- 5 out of 5 starsReviewed on 7/17/2025
She is an excellent listener and explainer.
- 5 out of 5 starsReviewed on 6/5/2025
Excellent Provider and very thorough
- 5 out of 5 starsReviewed on 5/22/2025
Dr Melia is always kind and well informed about my health issues,