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
Email address ziad.gellad@duke.edu

Dr. Gellad is an associate professor of medicine in the Division of Gastroenterology at Duke University Medical Center and a faculty member of the Duke Clinical Research Institute.  He is also a VA Career Development Awardee and holds an appointment in the Health Services Research and Development Center of Innovation at the Durham VA Medical Center.  His research focuses on the implementation of systems engineering methods to improve the quality and value of health care delivery with a specific emphasis in colorectal cancer screening.

Dr. Gellad has also received several innovation grants to develop and implement novel information technology platforms to improve the patient and clinician experience.  He is also an active contributor to the innovation and entrepreneurship activities within Duke University and co-founder of a health technology startup in Durham.

Dr. Gellad received his MD and MPH degrees from Johns Hopkins University.  He completed a residency in internal medicine and a fellowship in gastroenterology at Duke University Medical Center.  He is the Director of Quality for the Division of Gastroenterology and Associate vice Chair for Clinical Innovation in the Department of Medicine at Duke University Medical Center.   Dr. Gellad is past-chair of the Quality Measures Committee of the American Gastroenterological Association, associate editor for GI & Hepatology News and is on the Board of Editors for Clinical Gastroenterology and Hepatology.

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


"Reply." Clinical Gastroenterology and Hepatology 12, no. 3 (March 1, 2014): 527-null. (Letter)

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Gellad, ZF, Voils, CI, Lin, L, and Provenzale, D. "Physician perceptions on colonoscopy quality: results of a national survey of gastroenterologists." Gastroenterology research and practice 2014 (January 2014): 510494-.

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Taheri, J, Gellad, Z, Burchfield, D, and Cooper, K. "Simulation as a guide for systems redesign in gastrointestinal endoscopy: Appointment template redesign." Proceedings of the 2013 Winter Simulation Conference Simulation: Making Decisions in a Complex World, Wsc 2013 (December 1, 2013): 2204-2214.

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Gellad, Z, Burchfield, D, Cooper, K, and Taheri, J. "Impact of Propofol on Endoscopy Unit Efficiency: A Discrete Event Simulation Model." October 2013.


Gellad, ZF, Thompson, CP, and Taheri, J. "Endoscopy unit efficiency: quality redefined." Clin Gastroenterol Hepatol 11, no. 9 (September 2013): 1046-1049.e1.

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Gellad, ZF, Voils, CI, Lin, L, and Provenzale, D. "Clinical practice variation in the management of diminutive colorectal polyps: results of a national survey of gastroenterologists." The American Journal of Gastroenterology 108, no. 6 (June 2013): 873-878.

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Jackson, GL, Zullig, LL, Zafar, SY, Powell, AA, Ordin, DL, Gellad, ZF, Abbott, D, Schlosser, JM, Hersh, J, and Provenzale, D. "Using NCCN clinical practice guidelines in oncology to measure the quality of colorectal cancer care in the veterans health administration." Journal of the National Comprehensive Cancer Network : Jnccn 11, no. 4 (April 2013): 431-441.

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Gellad, Z. "Personalisation of colorectal cancer screening." The Lancet Oncology (2013).

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Gellad, Z. "Personalisation of colorectal cancer screening." The Lancet Oncology 14, no. 8 (2013): 673-675.

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Taheri, J, Gellad, Z, Burchfield, D, and Cooper, K. "A simulation study to reduce nurse overtime and improve patient flow time at a hospital endoscopy unit." Proceedings Winter Simulation Conference (December 1, 2012).

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