The Health Care Cost Institute (HCCI) released its first report tracking changes in expenditures and utilization of health care services by those younger than 65 covered by employer sponsored, private health insurance (ESI). This report (2010 Health Care Cost and Utilization Report) assesses the levels and changes in prices and utilization (including changes in the mix of services) focusing on 2009 and 2010. The report is based on de-identified, Health Insurance Portability and Accountability Act (HIPAA) compliant data sets from three billion health insurance claims provided by Aetna, Humana, and UnitedHealthcare, three of the nation’s largest health plans. Future reports from HCCI will include data from Kaiser Permanente. The payers have agreed to share their data with HCCI to help researchers study what influences the use and cost of health care services in the United States. Findings from the 2010 report reflect the national health care spending of more than 33 million privately insured people with employer-sponsored group health insurance.