Plain-English answer
No single U.S. dataset explains the healthcare system. CMS National Health Expenditure Accounts are the right starting point for national spending. MEPS is unusually useful for person-level cost, utilization, insurance, and employer coverage questions. CDC/NCHS surveys and vital statistics are central for health status, mortality, disease burden, access, and insurance coverage. Medicaid.gov and state Medicaid agencies are needed for Medicaid and CHIP enrollment, managed care, quality, and state implementation. FDA sources are required for product regulation. MedPAC, MACPAC, KFF, payer policies, hospital files, and provider datasets fill in program, state, payer, and market-access detail.
Source map
| Question | Best source family | What it can answer |
|---|---|---|
| How much does the U.S. spend? | CMS National Health Expenditure Accounts. | Total spending, payer shares, service categories, personal health care, state spending. |
| What do households use and pay? | AHRQ Medical Expenditure Panel Survey. | Expenditures, utilization, source of payment, insurance, out-of-pocket cost, employer coverage. |
| What is the population health signal? | CDC/NCHS, NHIS, NHANES, NVSS, BRFSS, disease surveillance. | Health status, mortality, risk factors, nutrition, access, disease prevalence, prevention. |
| What is happening in Medicare? | CMS, MCBS, MedPAC, Medicare claims and enrollment files. | Beneficiary profile, utilization, payment systems, Medicare Advantage, Part D, dual-eligible issues. |
| What is happening in Medicaid? | Medicaid.gov, state Medicaid agencies, MACPAC, KFF State Health Facts. | Enrollment, eligibility, managed care, benefits, state variation, quality, spending. |
| Can a product be marketed or paid? | FDA, CMS coding/coverage/payment pages, payer policies, hospital value-analysis sources. | Regulatory status, coding, coverage, payment, medical necessity, purchasing gate. |
Program data
CMS is the anchor for Medicare, Medicaid, CHIP, Marketplace, national spending, quality reporting, provider data, and payment systems. Its National Health Expenditure Accounts are official national estimates of U.S. health spending. MCBS adds survey detail on the Medicare population that claims alone cannot show. Medicaid.gov publishes monthly Medicaid and CHIP enrollment reports, data products, managed-care reporting, and quality information, while state Medicaid agencies publish state-specific rules and managed-care materials that national files cannot replace.
MedPAC and MACPAC are especially useful because they translate program data into policy-relevant exhibits. MedPAC's data books organize Medicare spending, beneficiaries, utilization, payment systems, Medicare Advantage, Part D, and dual-eligible issues. MACPAC's MACStats does similar work for Medicaid and CHIP, including eligibility, enrollment, spending, managed care, benefits, and access.
Coverage and access
Coverage analysis needs several sources because U.S. insurance is not one system. Census sources are useful for national and state insurance coverage. NCHS surveys are useful for health status, access, and population characteristics. KFF State Health Facts is valuable for state-level indicators across Medicaid, Medicare, uninsured, employer coverage, mental health, providers, and service use. For cost and use, MEPS is often the better choice because it links people, care, payments, insurance, and employers.
Market access sources
For a healthcare company, U.S. data work should not stop at market size. FDA sources identify whether a product is a drug, biologic, device, diagnostic, software function, or AI-enabled device and what regulatory pathway applies. CMS materials for medical technology companies separate coding, coverage, and payment. Commercial payer medical policies, Medicare coverage decisions, local coverage determinations, state Medicaid policies, hospital value-analysis requirements, and provider workflow evidence are needed to understand whether a product can move from authorization to actual use.
Research anchors
- CMS National Health Expenditure Data for official U.S. spending estimates.
- AHRQ Medical Expenditure Panel Survey for cost, utilization, payment, and insurance survey data.
- CDC/NCHS surveys for NHIS, NHANES, vital statistics, and population health data systems.
- Medicaid.gov enrollment reports for Medicaid and CHIP operations and enrollment.
- MedPAC data books and MACPAC MACStats for Medicare, Medicaid, and CHIP policy data.
- KFF State Health Facts for state-level health coverage, Medicaid, Medicare, provider, and health-status indicators.