Administration of Public Health Programs (U.S.) — NAICS 923120

An investor's primer for public- and private-market investors

1. Overview

The North American Industry Classification System (NAICS) code 923120 covers the government agencies that run public health in the United States — federal programs, state and territorial health departments, and the roughly 2,800 county and city health departments beneath them.[1][9][10] Their work is population-level, not patient-level: disease surveillance and outbreak response, immunization, restaurant and water inspections, vital records, environmental- and mental-health programs, and health statistics.[1] This is the planning, administration, and coordination of public health — the back office of the nation's health-protection system — as distinct from the clinics and hospitals that actually deliver care.[1]

Why an investor should care: this is a government function, not a company you can buy shares in. There is no publicly traded "public health department." But the sector spends real money — roughly $160 billion in 2023[4] — and it buys almost everything from private vendors: information-technology (IT) systems, laboratory testing, vaccines, eligibility software, consulting, and outsourced program administration. The investable angle is that supplier ecosystem, plus the closely related Medicaid managed-care business that public-sector health budgets feed.

• Public-market route: government-services contractors, health-IT integrators, diagnostics labs, and vaccine makers that count public health agencies among their customers — none are pure plays (see §4).
• Private-market route: private-equity-owned government-services firms (e.g., Gainwell Technologies, Guidehouse), privately held consultancies (Deloitte, Public Consulting Group), private credit and secondaries, and municipal bonds that finance public health capital (see §10).

A defining feature to understand up front: this industry's funding is boom-and-bust and politically driven. Spending more than tripled during COVID-19, then fell sharply, and in 2025 the federal government moved to claw back roughly $11.4 billion in pandemic-era grants and proposed cutting the Centers for Disease Control and Prevention (CDC) budget by more than half.[4][35][36] That volatility — not ordinary consumer or market demand — is the single most important thing an investor needs to price.

2. What it is and how it is structured

Scope (what's in). NAICS 923120 is a government-only industry inside Sector 92, Public Administration. It comprises government establishments engaged in the planning, administration, and coordination of public health programs — including environmental health, mental health, "categorical" (disease-specific) programs, health statistics, and immunization services — plus government public-health inspections, communicable-disease programs, and coroners' offices.[1]

Ownership mix. Almost entirely governmental, layered across three levels:

• Federal — the CDC, and parts of the Health Resources and Services Administration (HRSA), the Substance Abuse and Mental Health Services Administration (SAMHSA), and the Indian Health Service (IHS), which serves about 2.8 million American Indian and Alaska Native people through 600-plus federal and tribal facilities.[13] The federal role is mostly to fund and set standards, not to run local services.
• State/territorial — 59 chief health officials sit atop state and territorial agencies (50 states, Washington D.C., five territories, and three freely associated states), per the Association of State and Territorial Health Officials (ASTHO).[10]
• Local — roughly 2,800 local health departments (LHDs), organized by county, city, or district, per the National Association of County and City Health Officials (NACCHO).[9]

What it EXCLUDES (adjacent NAICS codes). The code is narrower than "everything health-and-government." A vendor supporting Medicaid, surveillance, or government health IT is not automatically in 923120 — a supplier's own primary activity sets its classification.[1]

This boundary matters for investors: the biggest health-related government dollars (Medicaid) technically sit in 923130, but the vendors serving both codes overlap heavily, so §4 treats them together while flagging the distinction.

3. How big it is — and why the standard business statistics don't show it

The undercount here is total, not partial. Our ground-truth statistics file contains no ingested metrics for NAICS 923120, and that gap mirrors a real one in the federal data. The usual federal business statistics an investor reaches for — the Economic Census, County Business Patterns, and the Small Business Administration figures behind Statistics of U.S. Businesses — exclude Public Administration and government establishments almost entirely.[2][3] The Bureau of Labor Statistics' Occupational Employment and Wage Statistics program does not publish a separate line for 923120; it folds these workers into "state government, excluding schools and hospitals" and "local government, excluding schools and hospitals."[7] So there are no reliable Census/SBA business counts, payroll, or receipts figures for this NAICS code — a metric genuinely absent from the federal business data, not one we are suppressing. The real numbers come from spending accounts, the Census of Governments, and the sector's own associations (NACCHO, ASTHO). The figures below are from those cited sources, not from a NAICS-level business census.

Spending. Governmental public health activities totaled about $160 billion in 2023 — 3.3% of the nation's ~$4.87 trillion in health spending — per the Centers for Medicare & Medicaid Services (CMS) National Health Expenditure accounts, as summarized by KFF.[4] That was down from a COVID-era peak of over $240 billion in 2020, and up from a low of about $80 billion in 2013.[4] The federal slice tells the volatility story most starkly: federal public health activity spending ran about $13.3 billion in 2019, spiked to $139.3 billion in 2020, and settled back to roughly $92.0 billion by 2022 as emergency money was spent down.[5] Historically most public health money came from state and local budgets; the pandemic temporarily inverted that.[4]

Federal grant flows. In fiscal 2023 the CDC obligated $14.9 billion to states and localities — $9.2 billion (62%) from its regular budget and $5.7 billion (38%) from time-limited COVID and infrastructure supplements.[6] Separately, the Public Health Infrastructure Grant has awarded more than $4.6 billion, including about $3.6 billion to state and territorial agencies.[7] Federal sources made up the largest share of state health-department budgets (53% in FY2021), ahead of state (36%) and other sources (11%).[6]

Workforce. Researchers estimate roughly 239,000 staff worked at state and local public health agencies in 2022, up from about 206,500 in 2019, though much of the increase was temporary pandemic hiring.[8] NACCHO separately counted about 182,000 workers at local health departments in 2022.[9] The largest occupations are office/administrative support (~37,600) and public/community-health nurses (~29,400).[8]

Program-footprint context (not industry revenue). The CDC says its Public Health Infrastructure Center supports more than 3,000 health departments — a broader count than NACCHO's ~2,800 because it includes state and territorial agencies.[11] And Medicaid.gov reported 74.3 million people enrolled in Medicaid or the Children's Health Insurance Program (CHIP) — including about 67.1 million Medicaid enrollees — in March 2026.[15] These describe the program footprint agencies and vendors serve, not 923120's own output.

4. The investable universe

There is no public company that is a public health agency — the agencies are government. Investors get exposure only through the vendors and adjacent payers that sell to them. For every name below, public health (and, for several, government work overall) is one slice of a broader business, so treat these as indirect, diluted exposure — not pure plays.

Major private operators and owners. Much of the closest-in vendor base is not public:

Note on the Medicaid managed-care names. Medicaid administration is technically NAICS 923130 (§2), but Medicaid is where the bulk of public-sector health dollars and the clearest listed-equity exposure sit, so these "Big Five" insurers belong in any honest map of the investable landscape around public health.[28]

5. How the money works

For the agencies (the industry proper). Public health departments are not profit-seeking; they are budget-funded. Their "economics" are about funding stability and mix, not margins:

• Appropriations and grants — the dominant input. Federal grants (CDC, HRSA, SAMHSA) are often categorical (locked to a specific disease or program) rather than flexible, which limits how agencies redeploy money when priorities shift.[4][6]
• Earned/fee revenue — vital-records fees, restaurant and environmental permits and inspections, and clinical-service fees.
• Third-party reimbursement — departments that deliver billable services (immunizations, sexually transmitted infection treatment, home visiting) can bill Medicaid and insurers, a growing lever as grant money proves unreliable.

Agencies spend this money through internal payroll, grants, cooperative agreements, and contracts. Federal contracts are typically firm-fixed-price, cost-reimbursement, or time-and-materials under the Federal Acquisition Regulation (FAR); firm-fixed-price places substantial cost risk on the contractor.[20]

For the vendors (where investment returns come from). Suppliers earn money on multi-year government contracts, and the metrics that matter are the government-services standard set:

• Contract backlog and book-to-bill — signed future revenue and the pace of new wins versus burn-off.
• Recompete win rate — most government work is periodically rebid; losing a large state contract at recompete is the core revenue risk.
• Contract structure — cost-plus, fixed-price, and increasingly transaction- or outcome-based BPO (paid per enrollee or per claim processed); implementation revenue versus recurring operations-and-maintenance.
• Billable utilization — for the consulting firms, the share of staff hours billed to clients.
• Cash conversion — government payment timing, receivables, and service-level/audit performance.
• Operating margin — thin for pure BPO and labor-only staffing (high single digits), richer for proprietary software, data assets, and analytics.

For the Medicaid managed-care names, the economics are insurance economics: per-member-per-month (PMPM) capitation paid by states, the medical loss ratio (MLR) (share of premium spent on care), and enrollment, which swings with eligibility policy — enrollment fell across the sector during the post-pandemic Medicaid "unwinding."[28]

6. What drives demand

• Outbreaks and emergencies. Pandemics, epidemics, disasters, and chemical incidents trigger surge funding — the COVID-19 tripling of spending is the textbook case.[4][5] Demand here is lumpy and event-driven; CDC's Public Health Emergency Preparedness program supports 62 state, local, and territorial health departments.[12]
• Chronic disease and behavioral health. Diabetes, heart disease, obesity, opioids, and mental health sustain baseline categorical programs.
• Births and children. Childhood immunization is a large recurring program: the federal Vaccines for Children (VFC) program ran roughly a $4.8 billion budget and distributed over 74 million pediatric doses in 2023.[14]
• Demographics and aging. Census projections say that by 2030 all baby boomers will be at least 65 and roughly one in five Americans will be of retirement age — raising demand for surveillance, prevention, and population-health planning.[21]
• Data modernization. CDC's Data Modernization Initiative and Public Health Data Strategy drive steady IT-vendor demand — cloud migration, electronic reporting, analytics, and interoperability — largely independent of the funding cycle.[16]
• Program complexity. Medicaid eligibility, renewals, fraud controls, and quality measurement require administrative infrastructure even when enrollment or benefits change.[15]
• Federal grant availability and politics. Because agencies depend on federal grants for a majority of their budgets, the federal appropriations cycle and administration priorities are the master demand switch — more than any market force.[6] Fiscal pressure also pushes agencies toward automation (an opportunity for vendors that can prove savings) but can equally produce price cuts, insourcing, or cancellation.

7. Regulation

Public health in the U.S. is primarily a state power, not a federal one. Under the Constitution's reservation of "police powers" to the states, states (and the localities they empower) hold the legal authority to quarantine, inspect, license, and mandate. The federal government's leverage is money and standards, exercised largely through the CDC under the Public Health Service Act, not command authority.[1] Practical consequences:

• Fragmentation is structural. With ~2,800 local departments under 59 state/territorial umbrellas, rules, capacity, and even legal authority vary widely by jurisdiction.[9][10] Voluntary accreditation (via the Public Health Accreditation Board) and federal grant conditions are the main tools pushing consistency.
• Health-data rules. The Health Insurance Portability and Accountability Act (HIPAA) Privacy Rule permits covered entities to disclose protected health information to authorized public-health authorities for surveillance, investigation, and intervention; contractors and business associates handling that data need written agreements and safeguards.[18] Title 42 of the Code of Federal Regulations, Part 2, adds stricter confidentiality protections for substance-use-disorder records that reach contractors and intermediaries.[19]
• Contracting rules. Federal vendors must comply with the FAR, security and accessibility requirements, and audit rights; state and local contracts add procurement, public-records, breach-notification, and civil-rights obligations.[20]
• Medicaid policy is a live catalyst. Public Law 119-21 requires certain adults ages 19–64 to demonstrate 80 hours per month of work, education, training, or community service, generally beginning no later than January 1, 2027, forcing states to rebuild eligibility, verification, and renewal systems — large near-term implementation work for vendors.[17]
• Tribal sovereignty gives the IHS and tribal health authorities a distinct legal footing.[13]
• Vaccine policy is shaped federally through advisory committees whose recommendations drive what public programs buy and cover — a lever that became contested in 2025 (§9).

8. Competitive dynamics and consolidation

Among the agencies there is no competition in the market sense — but there is a live consolidation debate. The ~2,800-department patchwork is widely seen as inefficient, and several states have moved to centralize or regionalize local departments and share services. Persistent underfunding and workforce attrition push in the same direction.[8][9]

Among the vendors, buyers are fragmented across federal, state, territorial, tribal, county, and city governments, and competition runs through bids, rebids, task orders, subcontracting teams, and contract vehicles. Incumbents benefit from system knowledge, security approvals, performance history, and agency relationships; new entrants win on lower cost, better interoperability, automation, or a more modern user experience.

The supplier layer is consolidating. Gainwell assembled a Medicaid-systems roll-up under Veritas Capital; Guidehouse moved from Veritas to Bain in a $5.3 billion deal; and Francisco Partners built Merative from IBM's former health-data assets.[31][32][33] That concentration cuts both ways for investors: scale wins bids, but a handful of large state recompetes can move a company's revenue — and execution failures carry political risk. In 2025 the Senate Finance Committee probed Deloitte, Gainwell, and other contractors over errors in state Medicaid eligibility systems.[37]

9. Risks

• Political and budget volatility — the dominant risk. In 2025 the federal government moved to claw back about $11.4 billion in pandemic-era public health grants (states won a preliminary injunction), announced roughly 10,000 HHS layoffs, and proposed a ~53% cut to the CDC budget in FY2026 with dozens of programs slated for elimination.[35][36] Funding whiplash is the defining hazard of this sector.
• Boom-bust cycles. Emergency surges (COVID) are followed by cliffs; vendors and agencies that staffed up on temporary money face contraction.[4][8]
• Workforce fragility. Burnout, attrition, and pay gaps thin the governmental workforce, and temporary hires mask underlying weakness.[8]
• Rebid and insourcing risk. A strong incumbent can still lose a contract to a lower bidder or an internal government team.
• Fixed-price execution risk. Cost overruns, staffing shortages, or poor service levels can erode or eliminate contract profit.[20]
• Cybersecurity and privacy risk. A breach of health or eligibility data can trigger remediation, litigation, regulatory action, and lost contracts.[18][19]
• Customer concentration. A single state, agency, or program can be a material share of a vendor's revenue.
• Vendor execution and reputational risk. Faulty eligibility systems and congressional scrutiny can hit contractor revenue and standing.[37]
• Policy shifts in vaccines and prevention. Changes to federal vaccine recommendations and prevention programs can reshape what public health buys and funds, with knock-on effects for vaccine makers and program vendors.[36]
• Legal and jurisdictional friction. State-versus-federal authority disputes (e.g., the grant-clawback litigation) create timing and funding uncertainty.[35]
• Private-equity/leverage risk. Acquisition debt and aggressive cost cuts can weaken vendor resilience when contracts are delayed or rebid.

10. How to invest, and the outlook

Public-market routes. There is no direct play; build exposure through the supplier tiers as a basket, not a single industry multiple, sizing for the fact that public health is a minority of each company's revenue:

• Government administration/BPO: Maximus (MMS), Conduent (CNDT).[22][23]
• Health-IT integration and analytics: Leidos (LDOS), General Dynamics/GDIT (GD), Booz Allen Hamilton (BAH), Accenture (ACN), Palantir (PLTR).[24][30]
• Medicaid managed care (state-funded): Centene (CNC), Elevance (ELV), Molina (MOH), UnitedHealth (UNH), CVS/Aetna (CVS).[28]
• Diagnostics and vaccines: Labcorp (LH), Quest (DGX); Pfizer (PFE), Merck (MRK), GSK (GSK), Sanofi (SNY), Moderna (MRNA).[14]

For any of these, examine the government revenue mix, contract type, backlog, recompete schedule, customer concentration, the share of revenue tied to federal grants now under pressure, free-cash-flow conversion, leverage, and cybersecurity controls.

Private-market routes. The closest-in vendors are private — Gainwell (Veritas), Guidehouse (Bain), Merative (Francisco Partners), Public Consulting Group, and Deloitte — reached through private-equity funds, co-investments, private credit, and secondaries.[31][32][33][34] Private investors also reach the sector through municipal bonds that finance public health facilities and systems. Underwrite renewal history, software ownership, implementation risk, compliance, debt, and the likely exit market. The agencies and their nonprofit/philanthropic partners are not investable.

Outlook (judgment). The near-term direction is federal retrenchment. Proposed CDC cuts, the grant clawback, and HHS restructuring point to a smaller federal footprint, shifting reliance back onto state and local budgets — some of which are moving to backfill, unevenly.[35][36] That is a headwind for grant-dependent program vendors and a tailwind where policy is expanding work: Medicaid work-requirement implementation (PL 119-21) has already prompted a multi-hundred-million-dollar technology-vendor pledge.[17][29] Longer term, the structural case is that the U.S. has chronically underfunded prevention relative to the ~97% of health dollars spent on treatment[4] — a gap that periodic crises re-expose. Whether that translates into durable spending or another surge-and-retreat is a political question, and it is the judgment call that should anchor any thesis in this space. The strongest economics should accrue to vendors with trusted government relationships, reusable technology, measurable outcomes, diversified customers, and conservative balance sheets; labor-only providers dependent on one contract or temporary emergency funding warrant the most caution.

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Sources

1. U.S. Census Bureau. 2022 NAICS Manual — 923120 Administration of Public Health Programs (definition and adjacent-code boundaries). 2022. https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf
2. U.S. Census Bureau. County Business Patterns Methodology (Public Administration / government coverage exclusions). 2026. https://www.census.gov/programs-surveys/cbp/technical-documentation/methodology.html
3. U.S. Census Bureau. About Statistics of U.S. Businesses (coverage limits). 2026. https://www.census.gov/programs-surveys/susb/about.html
4. KFF. Health Policy 101: U.S. Public Health — Public Health Funding (citing CMS National Health Expenditure Accounts): ~$160B in 2023, 3.3% of ~$4.87T; ~$240B 2020 peak; ~$80B 2013 low. 2024. https://www.kff.org/other-health/health-policy-101-u-s-public-health/
5. Health Affairs. National Health Care Spending in 2022 (federal public-health activity: $13.3B 2019 / $139.3B 2020 / $92.0B 2022). 2023. https://www.healthaffairs.org/doi/10.1377/hlthaff.2023.01360
6. KFF. CDC's Funding for State and Local Public Health: How Much and Where Does It Go? ($14.9B FY2023; 62/38 split; 53% federal share of state budgets FY2021). 2024. https://www.kff.org/other-health/cdcs-funding-for-state-and-local-public-health-how-much-and-where-does-it-go/
7. CDC. Public Health Infrastructure Grant — State & Territory Funding Profiles ($4.6B+; ~$3.6B to states/territories); and BLS OEWS coverage note. 2024. https://www.cdc.gov/infrastructure-phig/php/funding-profiles/state-and-territories.html
8. American Journal of Public Health (Leider et al.). Enumeration 2024: The Governmental Public Health Workforce (~239,000 in 2022, up from ~206,500 in 2019; occupations). 2025. https://ajph.aphapublications.org/doi/full/10.2105/AJPH.2024.307960
9. NACCHO. National Profile of Local Health Departments (~2,800 LHDs; ~182,000 workers). 2020/2024. https://www.naccho.org/resources/lhd-research
10. ASTHO. About Us (59 state/territorial chief health officials). 2024. https://www.astho.org/About/
11. CDC. About Public Health Infrastructure Center (supports 3,000+ health departments). 2026. https://www.cdc.gov/infrastructure/about/index.html
12. CDC. About the Division of State and Local Readiness (Public Health Emergency Preparedness — 62 departments). 2024. https://www.cdc.gov/orr/divisions-offices/about-division-of-state-and-local-readiness.html
13. Indian Health Service. About IHS (600+ facilities; ~2.8M people served). 2024. https://www.ihs.gov/aboutihs/
14. CDC. About the Vaccines for Children (VFC) Program (~$4.8B budget; 74M+ doses in 2023). 2024. https://www.cdc.gov/vaccines-for-children/about/index.html
15. Medicaid.gov. Medicaid & CHIP Enrollment (74.3M enrolled, 67.1M Medicaid, March 2026). 2026. https://www.medicaid.gov/medicaid/map-element-medicaid-and-chip-enrollment
16. CDC. Data Modernization at CDC. 2026. https://www.cdc.gov/data-modernization/php/about/index.html
17. CMS. CMS Launches Nationwide Framework to Implement Medicaid Work Requirements (Public Law 119-21; 80 hrs/month; by Jan 1, 2027). 2026. https://www.cms.gov/newsroom/press-releases/cms-launches-nationwide-framework-implement-medicaid-work-requirements
18. U.S. Department of Health and Human Services. Public Health: HIPAA Privacy Rule. 2023. https://www.hhs.gov/hipaa/for-professionals/special-topics/public-health/index.html
19. U.S. Department of Health and Human Services. Confidentiality of Substance Use Disorder Patient Records ("Part 2," 42 CFR Part 2). 2026. https://www.hhs.gov/hipaa/part-2/index.html
20. Federal Acquisition Regulation. Part 16 — Types of Contracts. 2026. https://www.acquisition.gov/far/part-16
21. U.S. Census Bureau. Demographic Turning Points for the United States: Population Projections for 2020 to 2060 (aging projections). 2020. https://www.census.gov/library/publications/2020/demo/p25-1144.html
22. Maximus, Inc. Form 10-Q (quarter ended Dec 31, 2025) — public-program operations, clinical services, and technology. 2026. https://www.sec.gov/Archives/edgar/data/1032220/000103222026000014/mms-20251231.htm
23. Conduent. 2025 Annual Report (Form 10-K) — 454M+ Medicaid claims; ~$80B government benefit payments processed. 2026. https://www.sec.gov/Archives/edgar/data/1677703/000167770326000024/cndt-20251231.htm
24. Leidos. Civilian Health (HHS, CMS, FDA, CDC). 2026. https://www.leidos.com/markets/health/civilian-health
25. Booz Allen Hamilton. Form 10-K (FY ended Mar 31, 2025). 2025. https://www.sec.gov/Archives/edgar/data/1443646/000144364625000076/bah-20250331.htm
26. General Dynamics Information Technology. GDIT Forms New Federal Health Division (CDC, CMS, IHS). 2024. https://www.gdit.com/about-gdit/press-releases/gdit-forms-new-federal-health-division/
27. Optum. About Optum Serve (federal health services). 2026. https://business.optum.com/en/federal-government/about-optum-serve.html
28. Georgetown University Center for Children and Families. Medicaid Managed Care: The Big Five in Q4 2024. 2025. https://ccf.georgetown.edu/2025/02/27/medicaid-managed-care-the-big-five-in-q4-2024/
29. CMS. Pledges from Medicaid Technology Companies to Support Community Engagement Implementation (Accenture, Deloitte, and others). 2026. https://www.cms.gov/newsroom/fact-sheets/fact-sheet-pledges-medicaid-technology-companies-support-community-engagement-implementation-related
30. FedScoop. HHS Makes Palantir Data Analytics Platform Available to All Its Agencies ($90M BPA; CDC DCIPHER). 2024. https://fedscoop.com/hhs-palantir-platform-bpa/
31. Guidehouse. Guidehouse Completes Transaction with Bain Capital ($5.3B, from Veritas). 2023. https://guidehouse.com/news/corporate-news/2023/guidehouse-completes-transaction-with-bain-capital
32. Gainwell Technologies. Our History (Veritas Capital; DXC divestiture 2020). 2026. https://www.gainwelltechnologies.com/our-history/
33. Francisco Partners. Completes Acquisition of IBM's Healthcare Data and Analytics Assets; Launches Merative. 2022. https://www.franciscopartners.com/media/Merative
34. Public Consulting Group. About PCG. 2026. https://publicconsultinggroup.com/about/
35. Fierce Healthcare / NBC News. States Win Injunction Against HHS' $11B Clawback of COVID-19, Public Health Grants. 2025. https://www.fiercehealthcare.com/regulatory/cdc-doge-claws-back-covid-19-grants-headed-states
36. Trust for America's Health. Public Health Infrastructure in Crisis: HHS Workforce Cuts, Reorganizations, and Funding Reductions (proposed ~53% CDC cut; ~10,000 HHS layoffs). 2025. https://www.tfah.org/report-details/funding-report-2025/
37. Healthcare Dive. Senate Finance Committee Probes Medicaid Contractors Over Faulty Systems (Deloitte, Gainwell). 2025. https://www.healthcaredive.com/news/senate-finance-probes-medicaid-contractors-deloitte-gainwell/