The U.S. Department of Health and Human Services (HHS), through the Office of the National Coordinator for Health Information Technology (ONC), today released the Health Data, Technology, and Interoperability: Patient Engagement, Information Sharing, and Public Health Interoperability (HTI-2) proposed rule for public comment. The HTI-2 proposed rule reflects ONC’s focused efforts to advance interoperability and improve information sharing among patients, providers, payers, and public health authorities.