Editor's Note: This article is part of a series that describes the many ways that the US Department of Health and Human Services (DHHS) interacts with the emergency care system. DHHS includes many divisions that are well known to the health care world, including the Centers for Medicare & Medicaid Services, the Health Resources and Services Administration, the National Institutes of Health, and the Agency for Healthcare Research and Quality. The goal of the series is to increase the visibility of federal emergency care-related activities within the emergency care community.