Geraint Lewis, M.A., M.Sc., F.R.C.P., F.F.P.H., is a public health physician and a senior fellow at the Nuffield Trust in London, England. He qualified in medicine from Cambridge University, and worked as a junior doctor in London and Sydney before beginning higher specialist training in Public Health Medicine. Working at Croydon Primary Care Trust between 2004 and 2006, Lewis developed and implemented the virtual wards project. After leaving Croydon he became a visiting fellow at the King's Fund and policy advisor at the UK Cabinet Office, before spending the 2007–08 academic year as a Commonwealth Fund Harkness Fellow at New York University. At NYU, his research explored how predictive modeling is being used in the United States. Lewis was the 2008 recipient of the National Directors' Award at the Veterans' Health Administration in Washington DC. His current interests include the development of predictive models for social care and predicting the impact of preventive interventions. He can be e-mailed at firstname.lastname@example.org.