What Is HHS? A Complete Guide to the Department of Health

What Is HHS? A Complete Guide to the Department of Health

The Department of Health and Human Services (HHS) is the largest domestic agency in the United States government by budget. It manages roughly $1.7 trillion in annual expenditures — more than the entire GDP of South Korea — and runs programs that touch virtually every American's life from birth through death.

Yet most Americans couldn't tell you what HHS actually does, what agencies fall under it, or why its leadership decisions matter to their daily health. This guide fixes that.

Whether you're trying to understand the MAHA initiative, figure out what Medicare actually covers, or just want to know which federal agency is responsible for what — this is the complete, plain-English overview.

📖 Related: Keep up with the health-policy shift via RFK Jr.'s Key Health Speeches: Analysis and Takeaways, What Does HHS Do? A Plain-Language Explainer, and MAHA Fit vs. Future: Complete App Comparison.

The Basics: What HHS Is and What It Does

The Department of Health and Human Services was established in 1979 when President Jimmy Carter split the Department of Health, Education, and Welfare (HEW) into two separate agencies — HHS and the Department of Education.

HHS's stated 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, HHS does four big things:

1. Provides healthcare coverage — Medicare and Medicaid together cover approximately 150 million Americans
2. Regulates food and drugs — through the FDA, which falls under HHS
3. Conducts and funds medical research — the NIH, also under HHS, is the world's largest funder of biomedical research
4. Delivers human services — child welfare, Head Start, community health centers, and dozens of other programs

The agency employs approximately 80,000 people and administers grants, contracts, and direct services in every state.

HHS by the Numbers (FY 2024)

To put the budget in context: HHS spends more in one year than the Pentagon ($858 billion). More than Social Security ($1.35 trillion) when you account for all mandatory and discretionary spending. It is not an exaggeration to call it the center of gravity in the U.S. federal government.

The Structure: HHS's 11 Operating Divisions

HHS is not a monolithic agency. It's an umbrella organization for 11 distinct operating divisions, each with its own mission, leadership, and programs. Understanding which division does what is essential to understanding HHS's actual reach.

1. Centers for Medicare & Medicaid Services (CMS)

Budget: ~$1.4 trillion | Beneficiaries: ~150 million

CMS is, by budget, the largest federal program of any kind. It administers:

• Medicare — federal health insurance for Americans 65+ and certain younger people with disabilities (63 million beneficiaries)
• Medicaid — joint federal-state health coverage for low-income individuals and families (90 million beneficiaries)
• CHIP (Children's Health Insurance Program) — coverage for children whose families earn too much for Medicaid but can't afford private insurance (~7 million beneficiaries)

If you're on Medicare or Medicaid, CMS administers your coverage. If you've used the Healthcare.gov marketplace, CMS runs that too.

Why it matters to your health: CMS's reimbursement rates determine what treatments your doctor will offer and how they'll be compensated. When CMS adds or removes a covered service, it affects 150 million Americans.

2. Food and Drug Administration (FDA)

Budget: ~$6.7 billion | Jurisdiction: 25 cents of every consumer dollar spent in the U.S.

The FDA regulates:

• Prescription and over-the-counter drugs
• Food safety and labeling (except meat, poultry, and egg products — those are USDA)
• Medical devices
• Dietary supplements
• Tobacco products
• Cosmetics
• Animal drugs and feed

The FDA does not approve every food sold in the U.S. It sets standards, enforces labeling requirements, monitors for contamination, and reviews applications for new drugs and food additives. The GRAS (Generally Recognized As Safe) system means most food additives are self-certified by manufacturers without active FDA review.

Why it matters to your health: The FDA's approval or non-approval of drugs, the standards it sets for food labeling, and the enforcement rigor it applies to food safety directly affect what's safe to eat and what medications are available.

3. National Institutes of Health (NIH)

Budget: ~$48 billion | Grants funded: ~50,000/year

The NIH is the world's largest funder of biomedical research. It comprises 27 institutes and centers, each focused on specific disease or research areas:

• National Cancer Institute (NCI)
• National Heart, Lung, and Blood Institute (NHLBI)
• National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
• National Institute of Mental Health (NIMH)
• And 23 more

NIH-funded research has contributed to the development of most major medical treatments of the past half-century. The Human Genome Project, mRNA vaccine technology foundational research, HIV/AIDS treatments, and countless cancer therapies trace their funding to NIH.

Why it matters: NIH determines what research gets done. Research funding shapes what becomes medical knowledge, which shapes what becomes medical practice, which shapes your healthcare.

4. Centers for Disease Control and Prevention (CDC)

Budget: ~$9.2 billion | Mission: Protect public health

The CDC is the U.S. federal public health agency. Its core functions:

• Surveillance (tracking disease outbreaks and health trends)
• Investigation (determining causes and patterns of disease)
• Prevention (developing and promoting prevention strategies)
• Preparedness (preparing for public health emergencies)

The CDC's Behavioral Risk Factor Surveillance System (BRFSS) is the source of most state-level health statistics — including the chronic disease data cited throughout this article and across MAHA Fit's content.

Why it matters: The CDC's recommendations carry enormous weight in public health, clinical practice, and policy. Its messaging on diet, exercise, vaccination, and disease management shapes what millions of Americans do and believe.

5. Substance Abuse and Mental Health Services Administration (SAMHSA)

Budget: ~$6.8 billion

SAMHSA leads federal efforts on mental health and substance use disorders. It funds community mental health centers, substance use treatment programs, and crisis intervention services (including the 988 Suicide and Crisis Lifeline).

The intersection of mental health/substance use with physical chronic disease is significant and underaddressed in most health frameworks: depression is comorbid with diabetes and cardiovascular disease at high rates, and substance use disorders accelerate chronic disease progression dramatically.

6. Health Resources and Services Administration (HRSA)

Budget: ~$14 billion

HRSA funds and oversees community health centers, rural health programs, and the Ryan White HIV/AIDS Program. It's the primary federal mechanism for providing healthcare to underserved populations — primarily through the network of Federally Qualified Health Centers (FQHCs), which serve approximately 30 million low-income patients annually.

7. Indian Health Service (IHS)

Budget: ~$6.6 billion

IHS provides healthcare services to approximately 2.6 million American Indians and Alaska Natives through a network of hospitals, clinics, and health stations. IHS operates under treaty obligations and has faced persistent underfunding challenges.

8. Agency for Toxic Substances and Disease Registry (ATSDR)

Budget: ~$100 million

ATSDR investigates the public health impact of environmental exposures to hazardous substances. It assesses contaminated sites and advises on health risks from environmental chemicals — a function that has increased in relevance as awareness of PFAS, microplastics, and endocrine-disrupting chemicals has grown.

9. Agency for Healthcare Research and Quality (AHRQ)

Budget: ~$394 million

AHRQ focuses on improving healthcare quality, safety, efficiency, and access through research. It develops clinical practice guidelines and measures that shape how healthcare is delivered across the system.

10. Administration for Children and Families (ACF)

Budget: ~$62 billion

ACF administers Head Start (early childhood education), child welfare programs, child support enforcement, and the Temporary Assistance for Needy Families (TANF) program. Its programs are most directly relevant to the social determinants of health for children.

11. Administration for Community Living (ACL)

Budget: ~$2.9 billion

ACL supports older adults and people with disabilities to remain in their communities through home- and community-based services. As the U.S. population ages, ACL's programs become increasingly central to managing chronic disease in elderly populations outside institutional settings.

How HHS Affects You Specifically

You may not interact with HHS directly, but its decisions affect your life through multiple pathways:

What you eat: FDA regulates food safety and labeling. If you eat packaged food, the information on that label is governed by FDA rules. Learn more about how the FDA regulates food.

What drugs are available: FDA drug approval determines what medications your doctor can prescribe. FDA's post-market surveillance determines whether drugs get pulled after approval.

Your health insurance: If you're on Medicare or Medicaid, CMS directly manages your coverage. If you buy insurance on the ACA marketplace, CMS runs it.

What research gets done: NIH funding priorities shape the medical knowledge your doctor acts on. A disease that receives significant NIH funding gets better treatment over time. A disease that doesn't, doesn't.

Your children's health: ACF's Head Start program, CHIP coverage, and school health guidelines all fall under HHS. The CDC's childhood vaccination schedule is developed and promoted through HHS.

Your community's public health: The CDC's disease surveillance, the health center network HRSA funds, and SAMHSA's mental health programs all shape your community's baseline health infrastructure.

HHS and the MAHA Initiative: Why It Matters

Under RFK Jr., HHS has undertaken the most significant reorientation in the agency's stated priorities in decades. The MAHA (Make America Healthy Again) Commission, the review of GRAS food additive classifications, the proposed school nutrition changes, and the chronic disease root-cause mandate all run through HHS's operational authority.

This matters because HHS has genuine regulatory power — through the FDA, HRSA, CMS, and CDC — to implement significant policy changes without requiring congressional legislation. Executive agencies can change rules, priorities, and enforcement levels within existing statutory authority.

The $1.7 trillion in HHS annual spending, in other words, is both the budget for managing American health and the lever for changing it. Who runs HHS, and what they prioritize, has real consequences for the health of 340 million people.

📖 Related: For the grassroots side of this health revolution, explore What Does HHS Do? A Plain-Language Explainer and MAHA Fit vs. Future: Complete App Comparison.

Frequently Asked Questions

Q: What's the difference between HHS, HHS agencies, and the USDA in food regulation? A: HHS (through the FDA) regulates most food safety and labeling. The USDA regulates meat, poultry, and egg products through its Food Safety and Inspection Service (FSIS). This split jurisdiction means two federal agencies share food safety oversight with sometimes inconsistent standards.

Q: Is HHS a cabinet department? A: Yes. The HHS Secretary is a Cabinet-level position confirmed by the Senate. The Secretary reports directly to the President and is fourth in the line of presidential succession.

Q: How do I interact with HHS programs directly? A: The most common direct interactions are through Medicare enrollment (via CMS), Medicaid enrollment (via state programs that contract with CMS), healthcare marketplace enrollment (HealthCare.gov, managed by CMS), and community health center visits (HRSA-funded). You can also report food safety concerns directly to the FDA through their consumer reporting portal.

Q: What is the HHS Secretary's actual power? A: Substantial. The Secretary can direct regulatory priorities for FDA, CDC, NIH, and CMS. They can propose rule changes (subject to notice-and-comment rulemaking), set enforcement priorities, direct grant funding toward priority areas, and convene inter-agency working groups. They cannot unilaterally rewrite statutes — but within existing law, their operational discretion is wide.

Q: How is HHS funded? A: HHS has two major funding streams: mandatory spending (primarily Medicare and Medicaid entitlements, which are determined by eligibility rules rather than annual appropriations) and discretionary spending (NIH, CDC, FDA, and other program funding, which requires annual congressional appropriation). The vast majority of HHS spending — over 80% — is mandatory entitlement spending.

Conclusion

HHS is the largest domestic agency in the U.S. government, managing more money than most countries and touching more American lives than any other federal department. Understanding what it does — and which of its many divisions is responsible for what — is essential context for following health policy, understanding your coverage, and making sense of initiatives like MAHA.

The agency is not a monolith: the FDA regulating your food additives and the CDC recommending your vaccinations and CMS administering your Medicare are all separate organizations with separate leadership, budgets, and priorities — housed under the HHS umbrella.

→ [See how the MAHA chronic disease initiative is changing HHS priorities → /hhs-chronic-disease-initiative]