U.S. Public Health Service (USPHS)The eight public health agencies within the the U.S. Department of Health and Human Services. Links to all eight are available here, with separate entries for the CDC, FDA, and NIH below.
Comprised of: Agency for Healthcare Research and Quality (AHRQ), Agency for Toxic Substances and Disease Registry (ATSDR), Centers for Disease Control and Prevention (CDC), Food and Drug Administration (FDA), Health Resources and Services Administration (HRSA), Indian Health Service (IHS), National Institutes of Health (NIH), and Substance Abuse and Mental Health Services Administration (SAMHSA).