Since the passage of the Affordable Care Act, the field of population health has evolved and matured considerably. Improving quality and health outcomes along with lowering costs has become an ongoing focus in delivery of health care. The new Third Edition of Population Health reflects this focus and evolution in todays dynamic healthcare landscape by conveying the key concepts of population health management and examining strategies for creating a culture of health and wellness in the context of health care reform. Offering a comprehensive, forward-looking approach to population health, the Third Editions streamlined organization features 14 chapters divided among 3 major sections: Part I – Population Health in the U.S.; Part 2 –The Population Health Ecosystem: and Part 3 – Creating Culture Change.