Skip Navigation

Gerard E Mullin, M.D., M.S.

Gerard E Mullin, M.D., M.S.

Headshot of Gerard E Mullin
  • Director, JHH Integrative GI Nutrition Services
  • Associate Professor of Medicine


Anemias, Blood in Stool (Hematochezia), Celiac Disease, Chest Pain, Colon Cancer, Colon Polyps, Colonoscopy, Constipation, Diarrhea, Gastroenterology, Gastroesophageal Reflux Disease (GERD), Gastrointestinal Bleeding, Heartburn, Hiatal Hernia, Iron Deficiency, Irritable Bowel Syndrome, Malabsorption, Rectal Bleeding, Stomach Ulcer, Unexplained Weight Loss more

Research Interests

Nutrition; Gut Microbiome

Request an Appointment

Insurance Information

Main Phone

Outside of Maryland & Washington D.C.

Request Appointment

International Patients

Request Appointment


The Johns Hopkins Hospital

Appointment Phone: 410-933-7495
600 N. Wolfe Street
Baltimore, MD 21287 map
Fax: 410-502-0603


Dr. Mullin is an associate professor of medicine at The Johns Hopkins University School of Medicine. Nationally and internationally renowned for his work in nutrition, Dr. Mullin has more than 30 years of clinical experience in the field of gastroenterology.

In 2009 he was named by the American Dietetic Association’s honorary member of the year. Dr. Mullin was the youngest person to receive an Honorary membership from the American Dietetic Association in 2009. He also received the Grace A. Goldsmith award presented by the American College of Nutrition in November 2011. This special award acknowledges a scientist who is under the age of 50 years, for significant achievements in the field of nutrition. 

Dr. Mullin is a reviewer and also serves on the editorial board of numerous gastroenterology journals. more


  • Director, JHH Integrative GI Nutrition Services
  • Director, JHH Capsule Endoscopy Program
  • Chair, JHH Nutrition Advisory Committee
  • Associate Professor of Medicine

Departments / Divisions



  • MD; UMDNJ-New Jersey Medical School (1985)


  • Medicine; The Mount Sinai Hospital (1988)


  • Gastroenterology; Johns Hopkins University School of Medicine (1991)
  • Integrative Medicine; University of Arizona Health Sciences Center (2008)

Board Certifications

  • American Board of Internal Medicine (Gastroenterology) (1991)
  • American Board of Internal Medicine (Internal Medicine) (1988)

Additional Training

Fellowship, National Institutes of Health - Credentialing Services Section / Integrative Medicine (Bethesda MD ) (1991)

Research & Publications

Clinical Trial Keywords

Elimination Diets in Gastrointestinal Disease; Gastroesophageal Reflux Disease; Weight Management; Irritable Bowel Syndrome; Inflammatory Bowel Disease; Gut Microbiome; Probiotics; Nutrition; Integrative Medicine

Selected Publications

View all on PubMed

Integrative Gastroenterology. Mullin GE Editor. Oxford Press. Publication date. June 22, 2011. ISBN 9780195371109.

The Inside Tract. Mullin GE, Swift K. Rodale Press. New York, New York. ISBN 9781605292649. Publication Date. July 5, 2011.

The Gastrointestinal and Liver Disease Nutrition Desk Reference. Mullin GE, Matarese LM Editor. Taylor and Francis Group, LLC-CRC Press. Boca Raton, Florida. ISBN 9781439812648. Publication Date. September 24, 2011.

The Academy Handbook of Gastrointestinal Nutrition. Matarese LM, Mullin GE, Raymond J Editors. Academy of Nutrition and Dietetics. Chicago, Illinois. ISBN 978-0-88091-450-5. In Press. Publication Date Summer 2013.

Integrative Nutrition 101. Anthology of Complementary and Alternative Nutrition Papers From Nutrition in Clinical Practice, 2007-2012. Mullin GE. Editor. Sage Publishing. In Press. Release date. February 7, 2013. 978-1-889622-15-6.

Celiac Disease. S.Devi Rampertab, Mullin GE. Editors. Springer Publishing. New York, New York. Under Contract.

Activities & Honors


  • Alpha Omega Alpha (AOA), 1985
  • House Staff Research Award, Mount Sinai Hospital, 1988
  • Resident Poster Competition Award, American College of Physicians, 1988
  • Who's Who in US Health and Medical Services, 1990
  • Young Investigator of the Year, Crohn's and Colitis Foundation, 1991
  • Young Investigator of the Year, Crohn's and Colitis Foundation, 1993
  • Marquis Who's Who in Science and Engineering, 1993
  • Marquis Who's Who in the World, 1994
  • Marquis Who's Who in America, 1996
  • Young Investigators Award, from the American College of Gastroenterology, 1996
  • Who's Who in Medicine and Healthcare, 1998
  • William Paterson University Distinguished Alumni Award, 1998
  • Americas Registry of Outstanding Professionals, 2003
  • Marquis Who's Who in Science and Engineering, 2003 - 2004
  • Long Island Magazines Top Doctors, 2003 - 2004
  • Americas Top Physicians, Consumers Research Council of America, 2004 - 2008
  • American Medical Association Physician Recognition Award, (AMA PRA) with Commendation, 2005 - 2007
  • Kiplings Who's Who in America, 2009
  • Cambridge Who's Who in America, 2009
  • Honorary Member, Academy of Nutrition and Dietetics, 2009
  • Biltmores Who's Who Among Executives and Professionals, 2010 - 2011
  • Covington's Who's Who
  • American College of College Grace Goldsmith Award, 2011
  • American Society for Parenteral and Enteral Nutrition Clinical Nutrition Team of Distinction


  • Alpha Omega Alpha, 1985
  • American College of Gastroenterology, 1992
  • American College of Nutrition, 2006
  • American College of Physicians, 1996
  • American College of Physicians, 1998
  • American Gastroenterology Association, 1992
  • American Gastroenterology Association, 2007
  • American Gastroenterology Association, Nutrition and Obesity Section Council, 2006
  • American Society for Enteral and Parenteral Nutrition (ASPEN), 1999
  • Crohns and Colitis Foundation of America-LI Chapter, 2003
    Board of Trustees
  • Long Island Chapter of ASPEN (National ASPEN Chapter of the Year 2002-2003), 2000
  • Long Island Gastroenterological Society, 1994
  • Maryland Chapter of ASPEN, 2007
    Board Member
  • Maryland Chapter of ASPEN, 2009
  • Maryland Chapter of ASPEN, Medical Advisor, 2005
  • Maryland Chapter of Crohn's and Colitis Foundation of America, 2006

    Board of Trustees

  • Maryland Chapter, Crohn's and Colitis Foundation, 2006
  • Maryland Gastroenterological Society, 2005
  • Medical Group Management Administrators (MGMA), 2004
  • New Jersey Medical School Alumni Association, 1991 - 1996
    Board of Trustees
  • New Jersey Society for Gastrointestinal Endoscopy, 1992
  • New York Gastroenterological Association, 1992
  • New York Gastroenterological Association, 2005
    President-elect, stepped down before serving term (moved to Baltimore)
  • New York Gastroenterological Association, 2002 - 2003
  • New York Gastroenterological Association, 2003 - 2004
  • New York Society for Gastrointestinal Endoscopy (NYSGE), 1993

Videos & Media

Recent News Articles and Media Coverage

DDW News video: Dietary supplements and the practice of gastroenterology

Rethinking Elimination Diets and FODMAPS: A Common-Sense Approach to IBS, Inside Tract (Fall 2018)

Is this you? Edit Profile
back to top button