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Photo of Dr. Mark Donowitz

Mark Donowitz, M.D.

Mark Donowitz, M.D.
Director, Hopkins NIH/NIDDK Conte Core Center
Professor of Medicine


Appointment Phone


Main Location

The Johns Hopkins Hospital

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, Hopkins NIH/NIDDK Conte Core Center
  • GI Division, Director of Basic Research
  • Professor of Medicine
  • Professor of Physiology

Centers & Institutes



The Johns Hopkins Hospital

Appointment Phone: 410-933-7495

600 N. Wolfe Street
Ross Research Building Suite 925
Baltimore, MD 21287 map
Phone: 410-955-9675
Fax: 410-955-9677

The Johns Hopkins Hospital

600 N. Wolfe Street
Carnegie 446D1
Baltimore, MD 21287 map


Clinical Gastroenterology, Diarrhea, Diarrheal Disease, Digestive Diseases, Gastroenterology, Short Bowel Syndrome

Research Interests

Intestinal Salt Absorption and the proteins involved including their regulation; Development of drug therapy for diarrheal disorders; Use of human enteroids to understand intestinal physiology and pathophysiology

    Additional Information

  • Education +


    • Johns Hopkins University School of Medicine (1968)


    • American Board of Internal Medicine / Gastroenterology (1975)
    • American Board of Internal Medicine / Internal Medicine (1972)
  • Research & Publications +
  • Academic Affiliations & Courses +
  • Activities & Honors +


    • AAAS
    • AAP
    • American Gastroenterogical Association
    • American Physiological Society
    • ASCI
    • Interurban Clinical Club

    Professional Activities

    • President, Gastoenterology Research Group
    • President, Interurban Clinical Club
    • President , American Gastroenterological Association, 2006 - 2007
  • Videos & Media +
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