The Health Data Initiative (HDI) Forum is a public-private collaboration among stakeholder organizations in the health data ecosystem. The 2012 HDI Forum brings together a diverse group of data experts, technology developers, entrepreneurs, policy makers, health care system leaders, CIOs, CTOs, and community advocates to support innovative applications of health and health care data. Initiated in 2010 by the Institute of Medicine and the U.S. Department of Health and Human Services, the Forum has become an annual event that brings the value of data to life by showcasing innovative applications, discussing data needs and uses in communities, strategies to build consumer services, and promoting innovation across all sectors of health information. Information about previous HDI Forums can be found at www.iom.edu/healthdata