Professor Greely's work has focused on the legal aspects of the health care financing system. His interests include the incentives for employers and insurers to discriminate among possible insured consumers and the legality of such discrimination. He is also interested in broad issues of health reform, in quality assurance, in practice guidelines, and in bioethics. He has also been increasingly active in the intersection of law and the revolution in genetics, including notably through his role as a co-director of the Stanford Program in Genomics, Ethics, and Society, as co-director of the Stanford Program in Law, Science, and Technology, as a member of the California State Commission on Human Cloning, and as a member of the Human Genome Diversity Project.