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Policy Research

Kindergarten Routine Vaccination Rates Continue to Decline

Executive Order and Officials’ False Claims Question Vaccine Safety

Measles Elimination Status: What It Is and How the U.S. Could Lose It

State, Local Policies on Vaccine Requirements for School Attendance

Impact of Federal Vaccine Recommendations on Insurance Coverage

HHS Public Health Policy Actions Under the Trump Administration 2025-2026

medicaid

Medicaid Work Requirements: Federal Outreach Requirements and State Plans

State Medicaid programs must inform people affected by new work requirements with federally required notices. This brief describes the requirements, state plans, and the complexities and tight implementation timelines states face.

The coverage gap exists because some states did not expand Medicaid under the ACA to cover adults under age 65 without dependent children with incomes at/below 138% of the federal poverty level (FPL)

How Many Uninsured Are in the Coverage Gap and How Many Could be Eligible if All States Adopted the Medicaid Expansion?

This analysis estimates that 1.4 million uninsured individuals in the ten states without Medicaid expansion, including many working adults, people of color, and those with disabilities, remain in the “coverage gap,” ineligible for Medicaid or for tax credits that would make coverage affordable through the Affordable Care Act’s Marketplaces.

Medicaid Work Requirements Medical Frailty Exemption: Key Takeaways from the CMS Interim Final Rule

What Could Medicaid Work Requirements Mean for SSI Applicants?

How Has Projected Medicaid Spending and Enrollment Changed Since Passage of the 2025 Reconciliation Law?

Affordable care act

Change in February effectuated enrollment, by state, 2025-2026

How Has ACA Marketplace Enrollment Changed Across States in 2026?

Following several years of rapid enrollment growth in the Affordable Care Act (ACA) Marketplaces that corresponded with temporary enhanced premium tax credits, enrollment fell for the first time in seven years in 2026, when those tax credits expired. Every state except for New Mexico saw a drop in ACA Marketplace enrollment from 2025 to 2026. State-based Marketplaces that run their own enrollment platforms, including those that partially offset the expiring federal enhanced tax credits, generally saw lower drops in enrollment (an 6% decline versus 15% for the federal marketplace).

How Much and Why ACA Marketplace Premiums Are Going Up in 2027

The Average Marketplace Deductible Grew in 2026, With Shifts to Higher-Deductible Plans as Enhanced Credits Ended

An image of text is an excerpt from Cynthia Cox's quick take which reads, "While the Trump administration attributes this drop in enrollment to their attempts to address fraud, this coverage loss happened at the same time millions of people faced steep increases in their premium payments — often in the double or even triple digits — with the expiration of enhanced tax credits."

ACA Marketplace Enrollment Is Down By 3 Million After Big Jump in Premium Payments

Enrollment dropped 13% following the expiration of enhanced premium tax credits at the beginning of this year. While the Trump administration attributes this drop in enrollment to their attempts to address fraud, this coverage loss happened at the same time millions of people faced steep increases in their premium payments – often in the double or even triple digits – with the expiration of enhanced tax credits.

policy spotlight

Explore the Basics of U.S. Health Policy

Health Policy 101 is a comprehensive guide covering fundamental aspects of U.S. health policy and programs, including Medicare, Medicaid, the Affordable Care Act, employer-sponsored insurance, racial and ethnic disparities, and more. The chapters can be downloaded in a PDF format for faculty and student use, and the information will be updated annually or as data and circumstances change.