County Health Rankings & Roadmaps, A Healthier Nation, County by County

The County Health Rankings models and measures

Our Approach

The County Health Rankings model of population health

What can I do?

Action Center

Explore guides and tools for improving health.

What Works for Health

Explore programs and policies that work!

What can I learn from others?


Key findings from the last four years of County Health Rankings and other national reports.

County-by-County Blog

Project updates, commentaries, events and news about health across the nation from the County Health Rankings & Roadmaps team.

Health care costs*

Health Care Costs are the price-adjusted Medicare reimbursements (Parts A and B) per enrollee.

Measure Tabs

Data Source

Years of Data Used


Dartmouth Atlas of Health Care

Since 1996, the Dartmouth Atlas of Health Care has examined patterns of health care delivery and practice across the United States, and evaluated the quality of health care Americans receive. The research has revealed striking variations in the amount of health care you are likely to receive depending on where you live. This is true not only across states and regions, but within individual states and cities. The very large claims databases used in the Dartmouth Atlas Project come from the Centers for Medicare and Medicaid Services (CMS), the federal agency that collects data for every person and provider using Medicare health insurance. Access to this data is made available for research purposes.

Explore the Data