Population Health: Creating a Culture of Wellness, Fourth Edition presents an overview of the current state of health in the U.S. and discusses the population health delivery and payment models, legal and regulatory landscape, and more, that provide the backdrop to all population health efforts. It places population health in the context of multiple determinants of health and highlights the importance of disease prevention and health promotion. Key updates include: New coverage of epidemiology topics including Syndromic surveillance and wastewater surveillance (Ch. 2) New chapter on the non-medical drivers of health (Ch. 3) and expanded coverage of this topic and the social determinants of health throughout. Completely restructured chapter (Ch. 7) on health systems, structures, and stakeholders that explores four distinct areas: Providers (and provider systems), Payors (and integrated systems), Pharma/Device, and the ACA New case studies on Population Health Data and Analytics topics (Ch. 8) New commentary on the ?Triple Aim? ? Population Health, Experience of Care, and Per Capita Cost (Ch. 12) Expanded coverage of the Medicaid expansion, preventive health services, Accountable Care Organizations, health insurance reforms, and public support for ACA/health reform (Ch. 14)