Shai Efrati (Hebrew: שי אפרתי, born 1971) is a physician from Israel and an associate professor at the Sackler Faculty of Medicine and the Sagol School of Neuroscience at Tel Aviv University as well as director of the Sagol Center for Hyperbaric Medicine and Research at the Yitzhak Shamir Medical Center in Israel. As of 2008 Efrati has served as chairman of the Israeli Society for Diving and Hyperbaric Medicine. Efrati is also Co-Founder and Chair of Medical Advisory Board for Aviv Scientific.