The independent source for health policy research, polling, and news.
KFF’s policy research provides facts and analysis on a wide range of policy issues and public programs.
KFF designs, conducts and analyzes original public opinion and survey research on Americans’ attitudes, knowledge, and experiences with the health care system to help amplify the public’s voice in major national debates.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the organization’s core operating programs.
This chart examines individual market enrollment data from 2011 through 2025, when enrollment reached a record high of 25.2 million people. Affordable Care Act (ACA) Marketplace enrollment increased following the enactment of enhanced premium tax credits in 2021, as more individuals became eligible for subsidies.
Every summer, health insurers submit rate filings to state regulators detailing expectations and justifying premium rate changes for ACA-regulated health plans for the coming year. With the enhanced premium tax credits set to expire at the end of 2025, consumers can expect increases in how much they pay for coverage.
This analysis illustrates how provisions included in the House budget reconciliation bill could expose Marketplace enrollees with unpredictable incomes to higher penalties when filing taxes if they underestimate their incomes. About one in four potential Marketplace shoppers had incomes that varied at least 20 percent from the beginning to the end of the year.
Enrollment in Affordable Care Act (ACA) Marketplace health plans reached a record 24.3 million people, more than double the total in 2020, with most of the growth occurring in states won by President Trump in the 2024 election, a new KFF analysis finds.
This analysis of enrollment in Affordable Care Act (ACA) Marketplace health plans finds a record 24.3 million people enrolled in 2025, more than double the total in 2020, with most of the growth occurring in states won by President Trump in the 2024 election. In six states, enrollment more than tripled from 2020 to 2025: Texas, Mississippi, West Virginia, Louisiana, Georgia, and Tennessee.
This brief examines a proposed rule that seeks to change how ACA plans would cover gender affirming care services. If finalized the rule could lead insurers to drop coverage or shift costs to individuals and states, making access to gender affirming care more difficult.
According to the Washington Post, at least 390,000 students were exposed to a school shooting (exposure is defined as students attending a school at which a shooting occurred during the current school year) since the 1999 Columbine shooting. This brief analyzes the rate of student exposure to school shootings over time at the national and state level. Exposure rates depend on factors including school enrollment size and state population size. Therefore, even a single school shooting incident in a state can impact many youths beyond those that are physically injured and may significantly increase exposure rates.
This analysis looks at the individual market enrollees who make at least four times the federal poverty level who would no longer be eligible for any tax credits if the current ACA Marketplace enhanced subsidies expire at the end of this year. Compared to other people with similar incomes, these enrollees are more likely to be early retirees, self-employed and living in rural areas.
As Congressional Republicans and President Trump search for trillions of dollars in cuts to mandatory federal spending that could help offset the cost of extending expiring tax cuts, this brief analyzes current support from the federal government for health programs and services, including both spending and tax subsidies as context for those federal budget discussions.
This analysis and interactive map illustrate how much more enrollees in Affordable Care Act (ACA) Marketplace plans would pay in premiums at the congressional district level if the enhanced subsidies were to expire in 2026 as under current law. The tool presents scenarios for an older couple who would lose subsidy eligibility due to their income level and for a single person with a $31,000 income. It also presents net average premium payment increases in each district in states that use Healthcare.gov.
© 2025 KFF