Lukejohn Day, MD

Dr. Lukejohn Day is UCSF Health's first system chief medical officer (CMO). He is responsible for ensuring that physician-leader roles align with UCSF Health's goals and for standardizing clinical policies and procedures across the health care system. He oversees the Office of Medical Affairs and Governance.

Previously, Day was a professor of medicine at UCSF and CMO at Zuckerberg San Francisco General Hospital and Trauma Center. As a gastroenterologist, he has held concurrent positions with increasing responsibility at UCSF and Zuckerberg San Francisco General. He is interested in research and policy with a focus on innovation, quality improvement and patient safety.

Day earned his bachelor's degree from Yale University and his medical degree from Stanford University School of Medicine. He is pursuing a master of business administration degree from the Wharton School of the University of Pennsylvania.

A member of the Oglala Lakota Nation in South Dakota, Day has published extensively on colon cancer screening disparities for American Indians and Alaskan Natives and on strategies for increasing American Indian and Alaskan Native physician representation in health care, especially within gastroenterology.