John P Geibel DSc, MD, MSc,AGAF

Professor of Surgery (Gastrointestinal) and of Cellular and Molecular Physiology; Vice Chair, Surgery; Director, Surgical Research; American Gastroenterological Association Fellow

Departments & Organizations

Yale Combined Program in the Biological and Biomedical Sciences (BBS): Molecular Medicine, Pharmacology, and Physiology

Office of Student ResearchSignal TransductionCellular & Molecular Physiology: Physiology and Integrative Medical Biology Track; Graduate Program in Cellular and Molecular PhysiologySurgery: Geibel LabSignal Transduction

Research Interests

Gastric Acid Secretion; Colonic Fluid Transport; Renal Physiology; Intracellular Ion Activity Measurements; Calcium Sensing Receptor; Diarrheal disease; electrophysiology; CFTR; AMPKinase volume regulation more...


  • M.S., University of New Brunswick, 1981
  • D.Sc., University of Innsbruck, 1983
  • M.D., University of Innsbruck, 1986

Selected Publications

  • Roginiel AC, Kohut DL, Kaur S, Saleh AM, Weber T, Geibel P, Singh H, and Geibel JP. Effect of NSAIDs on Na+/H+ exchanger activity in Rat colonic crypts. American journal of physiology Cell physiology 2013
  • Kopic S, and Geibel JP. Gastric acid, calcium absorption, and their impact on bone health. Physiological reviews 93: 189-268, 2013.
  • Capasso G, Geibel PJ, Damiano S, Jaeger P, Richards WG, and Geibel JP. The calcium sensing receptor modulates fluid reabsorption and acid secretion in the proximal tubule. Kidney international 2013.



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