Faculty Profile

William Parker
Section of Pulmonary / Critical Care
Assistant Professor of Medicine
Referring Physician Access Line: 1-877-DOM-2730

Academic Interests

Dr. Parker is a medical ethicist and health services researcher who studies the allocation of scarce medical resources. He is specifically interested in absolute scarcity problems, where demand greatly exceeds supply, and healthcare systems cannot avoid rationing. He applies advanced empirical methods to evaluate and design allocation systems according to the underlying ethical principles. His current projects focus on deceased donor organ allocation, critical care/ventilator rationing under crisis standards of care, and COVID-19 vaccine allocation.

Clinical Interests

Organ transplantation, critical care, clinical medical ethics, health care delivery systems.


  • Parker WF, Anderson AS, Hedeker D, Huang ES, Garrity ER Jr, Siegler M, Churpek MM. Geographic Variation in the Treatment of US Adult Heart Transplant Candidates. Journal of the American College of Cardiology. April 2018. doi: 10.1016/j.jacc.2018.02.030
  • Parker WF, Anderson AS, Gibbons R, Huang ES, Garrity ER, Ross LF, Churpek MM, Association of transplant center with survival benefit among adults undergoing heart transplantation in the United States. JAMA. November 2019. doi:10.1001/jama.2019.15686
  • Parker WF, Kevin C, Anderson A, Siegler M, Huang ES, Churpek MM. Practice Changes at U.S. Transplant Centers After the New Adult Heart Allocation Policy. Journal of the American College of Cardiology. June 2020. DOI: 10.1016/j.jacc.2020.01.066
  • Ran G, Anderson AS, Gibbons RD, Parker WF. Between-center Variation in High-Priority Listing Status under the New Heart Allocation Policy. American Journal of Transplantation, April 2021. doi: 10.1111/ajt.16614
  • Bhavani SV, Luo Y, Miller WD, Sanchez-Pinto LN, Mao C, Burhaneddin S, Coopersmith CM, Michelson KN, Parker WF. Simulation of Ventilator Allocation in Critically Ill Patients with COVID-19. American Journal of Respiratory and Critical Care Medicine. September, 2021. doi: 10.1164/rccm.202106-1453LE
For a complete list of publications click here:


  • BA, 2008, Williams College, Physics
  • MD, 2012, Pritzer School of Medicine, University of Chicago
  • Residency, 2015, University of Chicago, Medicine
  • Fellowship, 2015, University of Chicago, Medical Ethics
  • MS, 2018, University of Chicago, Public Health Sciences, Public Health
  • Fellowship, 2019, University of Chicago, Pulmonary and Critical Care Medicine
  • PhD, 2021, University of Chicago, Public Health Sciences