Ziad F. Gellad, MD

Associate Professor of Medicine
Member in the Duke Clinical Research Institute
Campus mail 2301 Erwin Road, Duke North - DUMC 3703, Durham, NC 27710
Phone (919) 668-7802

I am a gastroenterologist and health services researcher with an interest in optimizing health care value. My current research is focused on the use of systems engineering methodologies, including discrete event simulation modeling, to improve the quality and efficiency of health care delivery.

In Their Words

Education and Training

  • Fellow in Gastroenterology, Medicine, Duke University, 2006 - 2009
  • Medical Resident, Medicine, Duke University, 2003 - 2006
  • M.D., Johns Hopkins University, 2003
  • M.P.H., Johns Hopkins University, 2002


Gellad, ZF, and Lyles, KW. "Direct-to-consumer advertising of pharmaceuticals." Am J Med 120, no. 6 (June 2007): 475-480. (Review)

Full Text

Eisenstein, EL, Kong, DF, Anstrom, KJ, and Califf, RM. "In reply [5]." Journal of the American Medical Association 297, no. 16 (2007): 1770-1771.


van der Keyl, H, Gellad, ZF, and Owen, JA. "Disparity in the kinetics of onset of hypermutation in immunoglobulin heavy and light chains." Immunol Cell Biol 78, no. 3 (June 2000): 224-237.

Full Text

Owen, JA, van der Keyl, H, and Gellad, Z. "Disparity between the time of onset of heavy and light chain hypermutation." FASEB JOURNAL 13, no. 5 (March 15, 1999): A990-A990.