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Affordable Care Act

The ACA MarketplaceS

How Has Marketplace Enrollment Changed Across States in 2026?

Following several years of rapid enrollment growth in the 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 Marketplace enrollment from 2025 to 2026. State-based Marketplaces that run their own enrollment platforms, including those that partially offset the enhanced tax credits, generally saw lower drops in enrollment.

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Did the Affordable Care Act Make Health Care More Affordable?

The expiration of the ACA’s enhanced premium tax credits at the start of 2026, combined with rising insurer premiums, put a spotlight on health care affordability that extends beyond Marketplace enrollees. KFF’s Cynthia Cox examines the ACA’s record and the broader underlying question it raises: what’s a fair price for Americans people to pay for health care?

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  • KFF Health Tracking Poll: Public Views on Recent Tax and Budget Legislation

    Poll Finding

    KFF's Health Tracking Poll looks at awareness and perceived impact of the tax and budget law signed by Trump in July 2025. Nearly half of the public says that they expect the new law to generally hurt them and their families, about twice the share who say it will generally help. The law itself remains largely unpopular, with many more people holding unfavorable views than favorable ones.

  • State Demonstrations to Integrate Care and Align Financing for Dual Eligible Beneficiaries: A Review of the 26 Proposals Submitted to CMS

    Report

    The Centers for Medicare and Medicaid Services (CMS) has proposed two models to align Medicare and Medicaid benefits and financing for dual eligible beneficiaries, one capitated model and one managed fee-for-service model. In the spring of 2012, 26 states submitted proposals to CMS seeking to test one or both of these models. CMS is presently reviewing the states' proposals to determine which will be implemented. This background paper examines the contents of the 26 states'…

  • Pre-X Redux

    From Drew Altman

    With the focus now mainly on exchanges, Medicaid expansions, and enrolling the uninsured in newly available coverage arrangements, there is less attention lately to the ACA insurance reforms which have always been the most popular parts of the law – changes which could affect every American’s insurance in some way and which go into effect regardless of the implementation decisions states make.  In this column, I draw on our recent tracking polls to review where…

  • Teens, Drugs, and Overdose: Contrasting Pre-Pandemic and Current Trends

    Issue Brief

    This brief analyzes the latest CDC data on adolescent overdose deaths, finding that from 2022 to 2023, there was a small reduction in overdose fatalities among adolescents (from 721 to 708 deaths). Additionally, the synthetic opioid, fentanyl, has largely driven the increase in adolescent drug fatalities since the pandemic began, accounting for 76% of these fatalities in 2023. This analysis also explores federal and state policy responses to the drug crisis, such as requirements to…

  • KFF Health Tracking Poll: Public Weighs Health Care Spending and Other Priorities for Incoming Administration

    Feature

    With the incoming Trump administration and Republican-led Congress looking to ways to reduce federal spending, this Poll finds that the Medicare and Medicaid programs remain broadly popular, and more people favor more spending on those programs than less spending. Among potential actions on health, the public sees price transparency and limiting chemicals in food as top priorities. Few say so about cuts to Medicaid and restrictions on abortion.

  • Claims Denials and Appeals in ACA Marketplace Plans in 2023

    Issue Brief

    This brief analyzes federal transparency data released by the Centers for Medicare and Medicaid Services (CMS) on claims denials and appeals for non-group qualified health plans (QHPs) offered on HealthCare.gov in 2023. It finds that HealthCare.gov insurers denied nearly one out of every five claims (19%) submitted for in-network services. Information about the reasons for denials is limited, and few consumers appeal claims denials.

  • HealthCare.gov Insurers Denied Nearly 1 in 5 In-Network Claims in 2023, but Information About Reasons is Limited in Public Data

    News Release

    HealthCare.gov insurers denied nearly one out of every five claims (19%) submitted for in-network services and an even larger share (37%) share of claims for out-of-network services in 2023, a new KFF analysis finds. The analysis examines the main source of publicly available data on claims denials and appeals for individual-market plans available through the federal HealthCare.gov marketplace. The Affordable Care Act requires certain entities to report data about claims denials and appeals to encourage…

  • Congressional District Interactive Map: How Much Will ACA Premium Payments Rise if Enhanced Subsidies Expire?

    Issue Brief

    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…