Dr. Greenfield is the founder and medical director of The Center for Internet and Technology Addiction and Assistant Clinical Professor of Psychiatry at the University of Connecticut School of Medicine where he teaches Sexual Medicine, Behavioral Addiction Medicine, as well as supervising residents in psychiatry. He is a leading authority on behavioral and process addiction and author of numerous articles/book chapters and the book Virtual Addiction which in 1999 rang an early warning regarding the world’s growing Internet addiction problem. Dr. Greenfield lectures throughout the world and has appeared on CNN, Dr. Oz, Good Morning America, The Today Show, Fox News, ESPN, NPR and HBO. He’s been featured in U.S. News and World Report, Newsweek, People, Time, Washington Post, Wall Street Journal, and The Economist.
He is credited with popularizing the variable reinforcement (slot-machine model) of behavioral addiction and the dopamine-process addiction connection. Dr. Greenfield’s recent work is focused on the neurobiology of compulsive Internet and Smartphone use and achieving sustainable screen use. He is also the medical director of the Greenfield Recovery Center, a residential retreat center for compulsive Internet and video game use, opening February 2020. Dr. Greenfield is a member of the American Society for Addiction Medicine, The Sexual Medicine Society of North America, and the American Society for the Advancement of Pharmacotherapy; he is a Fellow and Past-President of the CT Psychological Association and he sits on numerous professional and editorial boards; he resides and directs his behavioral addiction medicine practice in Connecticut.