Dr. Parker is an intensivist, clinical medical ethicist, and health services researcher who runs an NIH-funded data science lab focused on the algorithmic allocation of scarce healthcare 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 policy, life-support triage under crisis standards of care, and the allocation of novel scarce therapeutics. Dr. Parker is the founding executive director of the Common Longitudinal ICU data Format (CLIF) consortium, a growing network of ICU data science labs that develop and utilize the open-source CLIF data standard to perform privacy-preserving federated ICU data science.
University of Chicago
PhD
2021
University of Chicago
Pulmonary and Critical Care Fellowship
2019
University of Chicago
MS
2018
University of Chicago
Internal Medicine Residency
2015
University of Chicago
Medical Ethics Fellowship
2015
Pritzker School of Medicine, University of Chicago
MD
2012
Williams College
BA
2008
The association of place-based disadvantage and access to deceased donor heart transplantation.
The association of place-based disadvantage and access to deceased donor heart transplantation. Am J Transplant. 2026 Feb; 26(2):393-403.
PMID: 40992603
Prone Positioning in a North American Cohort of Hypoxemic Patients on Mechanical Ventilation.
Prone Positioning in a North American Cohort of Hypoxemic Patients on Mechanical Ventilation. medRxiv. 2025 Sep 05.
PMID: 40950483
Optimal Vasopressin Initiation in Septic Shock.
Optimal Vasopressin Initiation in Septic Shock. JAMA. 2025 Aug 19; 334(7):643-644.
PMID: 40674081
US State Statutes Addressing Unilateral Clinician Decisions About Life-Sustaining Treatment.
US State Statutes Addressing Unilateral Clinician Decisions About Life-Sustaining Treatment. JAMA Health Forum. 2025 Aug 01; 6(8):e253508.
PMID: 40880106
Development of a risk score predicting survival after adult heart transplantation in the United States.
Development of a risk score predicting survival after adult heart transplantation in the United States. J Heart Lung Transplant. 2025 Dec; 44(12):1874-1882.
PMID: 40691955
The Necessity of Brain Blood Flow Testing in Thoracoabdominal Normothermic Regional Perfusion.
The Necessity of Brain Blood Flow Testing in Thoracoabdominal Normothermic Regional Perfusion. Transplantation. 2025 Nov 01; 109(11):1668-1670.
PMID: 40551304
Ethical allocation of physical and occupational therapy in acute care.
Ethical allocation of physical and occupational therapy in acute care. J Hosp Med. 2025 Dec; 20(12):1355-1358.
PMID: 40551291
Unilateral Do-Not-Resuscitate Orders-Reply.
Unilateral Do-Not-Resuscitate Orders-Reply. JAMA. 2025 Jun 17; 333(23):2114-2115.
PMID: 40366682
Association of the 2018 U.S. Heart Allocation Policy Change and the Survival Benefit of Heart Transplantation.
Association of the 2018 U.S. Heart Allocation Policy Change and the Survival Benefit of Heart Transplantation. JACC Heart Fail. 2025 Jul; 13(7):102480.
PMID: 40472621
Re: Optimizing the handling of missing data in the UNOS database.
Re: Optimizing the handling of missing data in the UNOS database. J Heart Lung Transplant. 2025 Sep; 44(9):1526.
PMID: 40436225