The United States Public Health Service (USPHS) is a wide-ranging organization that provides essential public health services to millions of Americans every year. As one of the nation's leading public health agencies, the USPHS performs a variety of critical functions, from disease prevention and control to health promotion and research. Some synonyms for this important organization might include the USPHS Commissioned Corps, the National Institutes of Health (NIH), the Centers for Disease Control and Prevention (CDC), and the Health Resources and Services Administration (HRSA). Other related terms might include public health, healthcare, medical research, epidemiology, and health policy, among others. Whatever the term used, the USPHS remains a cornerstone of American public health and wellness.