HHS stands for the U.S. Department of Health and Human Services, the federal government’s principal agency for protecting public health and providing essential social services. It oversees familiar agencies like the CDC, FDA, and National Institutes of Health, and it administers health coverage for more than 160 million Americans through Medicare, Medicaid, and related programs. With roughly 92,600 employees as of September 2024, HHS touches nearly every aspect of healthcare in the United States.
What HHS Actually Does
The department’s official mission is to “enhance the health and well-being of all Americans, by providing for effective health and human services and by fostering sound, sustained advances in the sciences underlying medicine, public health, and social services.” In practical terms, that means HHS is responsible for approving the safety of your medications, funding medical research, tracking disease outbreaks, running health insurance programs for seniors and low-income families, enforcing your medical privacy rights, and coordinating the federal response to health emergencies.
HHS is a cabinet-level department, meaning its leader, the Secretary of Health and Human Services, reports directly to the President and advises on health policy. The current secretary is Robert F. Kennedy, Jr.
The 11 Agencies Inside HHS
HHS is not a single organization. It contains 11 operating divisions, each with its own focus. Most people interact with at least one of these agencies without realizing they all fall under the same department.
Health and Medical Agencies
- Centers for Disease Control and Prevention (CDC): tracks and responds to infectious disease outbreaks, issues public health guidelines, and monitors health trends nationwide.
- Food and Drug Administration (FDA): reviews and approves drugs, vaccines, medical devices, and food products for safety before they reach consumers.
- National Institutes of Health (NIH): the country’s largest biomedical research institution, funding studies on everything from cancer to rare genetic diseases.
- Centers for Medicare and Medicaid Services (CMS): runs Medicare (for adults 65 and older), Medicaid (for lower-income individuals and families), the Children’s Health Insurance Program, and the Health Insurance Marketplace. CMS covers more than 160 million people.
- Health Resources and Services Administration (HRSA): expands access to healthcare in underserved communities, including funding community health centers.
- Indian Health Service (IHS): provides healthcare to American Indians and Alaska Natives.
- Agency for Healthcare Research and Quality (AHRQ): studies how to make healthcare safer, higher quality, and more accessible.
- Agency for Toxic Substances and Disease Registry (ATSDR): investigates health threats from environmental contamination, such as chemical spills or hazardous waste sites.
- Substance Abuse and Mental Health Services Administration (SAMHSA): focuses on reducing the impact of substance use disorders and mental illness.
Human Services Agencies
- Administration for Children and Families (ACF): manages programs that support families, children, and communities, including Head Start (early childhood education), child support enforcement, refugee resettlement, foster care oversight, and anti-trafficking efforts.
- Administration for Community Living (ACL): supports older adults and people with disabilities in accessing community resources so they can live independently.
Beyond these 11 divisions, HHS also houses the Administration for Strategic Preparedness and Response (ASPR), which leads the nation’s medical preparedness for disasters and public health emergencies, and the Advanced Research Projects Agency for Health (ARPA-H), which funds high-risk, high-reward health research.
How HHS Affects Your Healthcare
If you have health insurance through Medicare, Medicaid, or a marketplace plan, HHS is the department running that system. If you’ve ever taken an FDA-approved medication, received a vaccine recommended by the CDC, or benefited from a medical breakthrough funded by NIH research grants, HHS played a direct role.
HHS also protects your medical privacy. Its Office for Civil Rights enforces HIPAA, the federal law that prevents healthcare providers, insurers, and other covered entities from sharing your health information without your consent. If you believe your medical privacy has been violated, you can file a complaint directly with this office.
HHS and Emergency Response
During public health emergencies, whether pandemics, natural disasters, or bioterror threats, HHS coordinates the federal medical response. ASPR leads this effort, scanning for emerging threats and managing the national stockpile of medical supplies. The CDC handles disease surveillance and containment, while the FDA fast-tracks reviews of treatments and vaccines when needed. This coordination across multiple agencies under one department is what allows the federal government to mount a unified health response during a crisis.
Beyond Medicine
The “Human Services” half of HHS is easy to overlook, but it runs some of the country’s most widely used social programs. The Administration for Children and Families alone oversees Head Start programs serving young children, child welfare and foster care systems, child support enforcement, family violence prevention, refugee resettlement, and the Temporary Assistance for Needy Families (TANF) program. The Administration for Community Living funds services like meal delivery, transportation assistance, and caregiver support for older adults and people with disabilities.
These programs exist under HHS because health outcomes and social conditions are deeply connected. A child’s access to early education, a family’s economic stability, and an older adult’s ability to live at home all shape long-term health in measurable ways. Housing them in the same department as the CDC and NIH reflects that link.