HHS has 11 operating divisions, including eight agencies in the U.S. Public Health Service and three human services agencies. These divisions administer a wide variety of health and human services and conduct life-saving research for the nation, protecting and serving all Americans.

CDC is the nation’s health protection agency and is one of the major operating components of the Department of Health and Human Services.

A part of the U.S. Department of Health and Human Services, NIH is the largest biomedical research agency in the world.

The Centers for Medicare & Medicaid Services, CMS, is part of the Department of Health and Human Services (HHS).

FDA is an agency within the Department of Health and Human Services and includes the Center for Drug Evaluation and Research, Center for Food Safety and Applied Nutrition, Center for Tobacco Products, Center for Devices and Radiological Health, and more.

The Substance Abuse and Mental Health Services Administration (SAMHSA) is the agency within the U.S. Department of Health and Human Services (HHS) that leads public health efforts to advance the behavioral health of the nation and to improve the lives of individuals living with mental and substance use disorders, and their families.

The Indian Health Service, an agency within the Department of Health and Human Services, is responsible for providing federal health services to American Indians and Alaska Natives.

EPA's mission is to protect human health and the environment. The EPA Administrator is appointed by the President and customarily accorded Cabinet rank.

OSHA is part of the United States Department of Labor. The administrator for OSHA is the Assistant Secretary of Labor for Occupational Safety and Health. OSHA's administrator answers to the Secretary of Labor, who is a member of the cabinet of the President of the United States.

Headquartered in Washington, D.C., FEMA has 10 regional offices located across the country and coordinates within the federal government to make sure America is equipped to prepare for and respond to disasters.