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John Geibel

Professor Emeritus of Surgery (Gastrointestinal); Vice Chair, Surgery; Director, Surgical Research; American Gastroenterological Association Fellow; Fellow of the Royal Society of Medicine

Contact Information

John Geibel, DSc, MD, AGAF, MS, FRS

Lab Location

Mailing Addresses

  • Gastrointestinal Surgery

    PO Box 208062

    New Haven, CT 06520-8062

    United States

  • Yale University

    BML 232, 310 Cedar Street

    New Haven, CT 06510

    United States


John Geibel is Vice Chairman of the Department of Surgery at Yale School of Medicine and Director of Surgical Research and Professor of Cellular and Molecular Physiology. His early research training was in Innsbruck Austria where he worked in the Physiology Department and investigated renal physiology on the isolated perfused tubule model. He holds a Bachelors of Science Degree in Physiology, an MD and DSc degree as well as a Master’s of Science, and a Master’s of Arts Degree. He has also obtained his Dozent in Medicine from the University of Innsbruck. After obtaining his Dozent he went to Yale University first as a visiting fellow and then joined the faculty in both Surgery and Cellular and Molecular Physiology where he rose through the ranks to Professor in both faculties.

Academically, Professor Geibel’s active research interests are on the role of the Calcium Sensing Receptor (CaSR) in gastrointestinal physiology and pathophysiology. In addition, John Geibel has conducted research in fluid and electrolyte transport in the intestine where he was the first to identify that the colonic crypt can both actively secrete and absorb fluid. He has also identified 4 new transport pathways in the stomach that play important roles in acid secretion and may help to explain some of the hypersecretion of acid that occurs in patients. In addition he maintains a research program in the kidney where he was the first to identify a functional role for the H-ATPase in the proximal tubule; he was also the first to demonstrate a role for Angiotensin on the Na/H exchanger and Na/HCO3 and H-ATPase in the proximal tubule. Professor Geibel is the author of over 250 publications and presents his findings both nationally and internationally. He is the holder of 10 patents on the role of the calcium sensing receptor on gastrointestinal models and is currently actively working to begin clinical trials on a method to stop secretory diarrhea in the developing world based on targeting the calcium sensing receptor. He has also patented a new method to suppress acid secretion. Recently Dr. Geibel has actively developed a 3D Bioprinting program for vascular anomalies and intestinal repair.

Education & Training

  • MD
    University of Innsbruck (1986)
  • DSc
    University of Innsbruck (1983)
  • MS
    University of New Brunswick, Physiology (1981)


  • New Insights in 3D Bioprinting from Vessels to Intestines
    Mainz, RP, Germany 2019
    3D Biprinting World Congress

Honors & Recognition

AwardAwarding OrganizationDate
America's Top DoctorsResearch Council of America2019
Doctor of Medicine h.c.Paracelsus Medical University2019
America's Top DoctorsResearch Council of America2018
America's Top DoctorsResearch Council of America2014
America's Top Doctors Research Council of America2013
America's Top DoctorsResearch Council of America2012
Americas Top DoctorsResearch Council of America2011
America's Top DoctorsResearch Council of America2010
America's Top DoctorsResearch Council of America2009
America's Top DoctorsResearch Council of America2008
NIDDK NIH Chair Special Emphasis Panel KO-1 awardational Institute of Diabetes and Digestive and Kidney Diseases/National Institute of Health2005
Who’s Who in Medicine and Healthcare1997
Who’s Who In the East 1995
Who’s Who In America1995
Who’s Who In Science and Engineering1995
Dozent der MedicineUniversitat Innsbruck, Innsbruk, Switzerland1992
Young Investigator International Society of Nephrology travel fellowshipSociety of Nephrology1987
National Research Service Award: NIH Post-Doctoral fellowshipNational Institute of Health1985, 1988

Professional Service

YCCIYale General Clinical Reaserch Center Scientific Review Board2007 - 2014
Yale UniversityProvost Committee on Cooperative Research2006 - 2009
Yale School of MedicineTerm Appointments and Promotion Committee2006 - 2009
Yale School of MedicineFunds and Felloship Committee2005 - 2006
Yale School of MedicineFunds and Felloship Committee2003 - 2006
American Journal of Physiology CellAssociate Editor2000 - 2014
eMedicineEditor in Chief of eMedicine1995 - 2014

Departments & Organizations