The Office of the Assistant Secretary for Health (OASH) is a staff office of the U.S. Department of Health and Human Services (HHS). It is led by the assistant secretary for health, who serves as the senior advisor on public health and science issues to the secretary of health and human services. The office serves as the focal point for leadership and coordination across the department in public health and science, provides direction to program offices within OASH, and provides advice and counsel on public health and science issues to the secretary.