A significant body of evidence shows that law schools and many elite colleges use large admissions preferences based on race, and other evidence strongly suggests that large preferences can undermine student achievement in law school and undergraduate science majors, thus producing highly counterproductive effects. This article draws on available evidence to examine the use of racial preferences in medical school admissions, and finds strong reasons for concern about the effects and effectiveness of current affirmative action efforts. The author calls for better data and careful investigation of several identified patterns.