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Photo of Dr. Maria Oliva-Hemker

Maria M Oliva-Hemker, M.D.

Director of Ped. Gastroenterology & Nutrition
Professor of Pediatrics

Female  | Languages: English, Spanish

Appointment Phone


Main Location

Johns Hopkins Pediatric Specialty Clinic

Out-of-State & International Patients +
Out of State Patients

Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

Learn more about our out-of-state patient services »

International Patients

Call +1-410-502-7683 (7a.m. to 6p.m., EST, Mon-Fri)

Learn more about our international patient services »


  • Director of Ped. Gastroenterology & Nutrition
  • Professor of Pediatrics



Johns Hopkins Pediatric Specialty Clinic

Appointment Phone: 410-955-8769

200 N. Wolfe Street
Rubenstein Child Health
Baltimore, MD 21287 map
Phone: 410-955-8765
Fax: 410-955-1464

The Johns Hopkins Hospital

Appointment Phone: 410-955-8769

600 N. Wolfe Street
Sheikh Zayed Tower
Baltimore, MD 21287 map
Phone: 410-955-8769
Fax: 410-955-1464


Gastrointestinal Diseases, Inflammatory Bowel Disease, Pediatric Gastroenterology

Research Interests

Inflammatory bowel diseases; Crohn''s disease; ulcerative colitis


Dr. Maria Oliva-Hemker is the Chief of the Division of Pediatric Gastroenterology and Nutrition. In 1998, Dr. Oliva-Hemker began the Pediatric Inflammatory Bowel Disease (IBD) Center at Hopkins, which provides evaluation and medical care to hundreds of children and adolescents with Crohns disease and ulcerative colitis from all over the United States and beyond. She is the inaugural recipient of the Stermer Family Professorship in Pediatric IBD.

Dr. Oliva-Hemker is an active clinical researcher who has co-authored numerous articles, book chapters and reviews and has served on multiple editorial boards. She is an editor-in-chief of the book Your Child with Inflammatory Bowel Disease: A Family Guide for Caregiving.

Dr. Oliva-Hemkers clinical practice focuses on inflammatory intestinal disorders such as IBD, autoimmune enteropathy and eosinophilic gastroenteritis. Additional clinical interests include malabsorption syndromes and nutritionally-related disorders such as short bowel syndrome, failure-to-thrive and celiac disease.

Dr. Oliva-Hemker has been named among Americas Top Doctors by Castle Connolly Medical Ltd. for more than 10 years and is among Marquis Whos Who in Medicine and Healthcare. She has been named a Baltimore Top Doc and has received a U.S. News and World Report Top Doctor designation for being in the top 1% of pediatric gastroenterologists in the nation. more

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