More than a decade after its enactment, tens of millions of people nationwide rely on coverage options created through the Affordable Care Act of 2010 (ACA). The law has survived multiple court challeges at the U.S. Supreme Court and repeated attempts by Republicans in Congress to repeal it. Subsequent legislation has scaled back some aspects of the law and expanded others, including by the COVID-19 relief bill, the American Response Plan Act of 2021. This page highlights relevant analysis about the ACA and proposed and enacted changes to it..
For information about ACA Marketplace Open Enrollment, including fact sheets and 300+ FAQs, visit our collection of resources on Understanding Health Insurance.
Featured Affordable Care Act Resources

Potential Costs and Impact of Health Provisions in the Build Back Better Act
A summary of 10 of the major health coverage and financing provisions of the current Build Back Better Act, with discussion of the potential implications for people and the federal budget.
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Related Affordable Care Act Resources
- 5 Charts About Public Opinion on the Affordable Care Act
- A Closer Look at the Uninsured Marketplace Eligible Population Following the American Rescue Plan Act
- Eligibility for ACA Health Coverage Following Job Loss
- Pre-Existing Condition Prevalence for Individuals and Families
- Building on the Evidence Base: Studies on the Effects of Medicaid Expansion, February 2020 to March 2021
- FAQs: Health Insurance Marketplace and the ACA
- Explaining Health Care Reform: Questions About Health Insurance Subsidies
- Status of State Medicaid Expansion Decisions: Interactive Map
- Preventive Services Tracker
- Tracking Section 1332 State Innovation Waivers

How Marketplace Costs and Premiums will Change if Rescue Plan Subsidies Expire
In this Policy Watch we explore the potential impact of the expiration of the American Rescue Plan Act’s enhanced financial help and new eligibility for the Affordable Care Act’s health insurance Marketplace federal subsidies. While the COVID-19 relief legislation passed earlier this year provides greater subsidy assistance through 2022, Democrats in Congress are currently considering making the temporary federal help permanent or extending it as part of their planned budget reconciliation legislation.
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Obamacare y Usted: Si no tiene seguro médico
Obamacare ha creado nuevas maneras de tener cobertura de salud. Si usted no tiene seguro médico a través de su empleador, seguramente pueda obtenerlo a través del nuevo Mercado de los Seguros Médicos (o “intercambio”) en su estado. Nuevas opciones de cobertura Llenando una única aplicación, usted aprenderá sobre sus…
Fact Sheet Read MoreState-by-State Estimates of the Number of People Eligible for Premium Tax Credits Under the Affordable Care Act
Key provisions of the 2010 Affordable Care Act (ACA) create new Marketplaces for people who purchase insurance directly and provide new premium tax credits to help people with low or moderate incomes afford that coverage. This analysis estimates that about 17 million people who are now uninsured or who buy insurance on their own (“nongroup purchasers”) will be eligible for premium tax credits in 2014. This issue brief provides national and state estimates for tax credit eligibility for people in these groups.
Issue Brief Read MoreImplications of the Affordable Care Act for People With HIV Infection and the Ryan White HIV/AIDS Program: What Does the Future Hold?
There are numerous aspects of the Affordable Care Act that will be important for people with HIV in the U.S., — however, it is unlikely that these changes will address all the needs of people with HIV. The Ryan White HIV/AIDS Program will thus remain crucial for the provision of adequate health care to HIV-infected individuals, but it will need to change. Changes in the Ryan White Program’s role will depend largely on state decisions on Medicaid expansion and health care marketplaces. This article, published in the September/October issue of Topics in Antiviral Medicine, summarizes a presentation by Jennifer Kates of the Kaiser Family Foundation at the IAS–USA continuing education program held in New York, New York, in April 2013.
Issue Brief Read MoreKaiser Health Tracking Poll: October 2013
The October Kaiser Health Tracking Poll finds the divided public’s opinion of the ACA remains similar to the previous month.
Poll Finding Read MoreObamacare Vital Signs Not Just Numbers
In his latest column, Kaiser President and CEO Drew Altman discusses the focus on first year metrics, especially enrollment projections, in the ACA debate.
Perspective Read MoreObamacare and You: If You Are a Woman…
This short explainer highlights key changes for women coming under the Affordable Care Act, also known as Obamacare.
Fact Sheet Read MoreA Look at Section 1115 Medicaid Demonstration Waivers Under the ACA: A Focus on Childless Adults
This brief provides an overview of Section 1115 waiver authority, describes major provisions of waivers that extend coverage to childless adults, and identifies key issues and implications of these waivers looking forward to the Affordable Care Act and beyond.
Issue Brief Read MoreJAMA Forum: The Affordable Care Act After Week 1–What We Know and What We Don’t Yet Know
Larry Levitt’s October 2013 column on what we know and don’t know after the first week of Obamacare open enrollment is now available on The JAMA Forum.
Perspective Read MoreHealth Coverage and Care for American Indians and Alaska Natives
This brief provides an overview of health coverage and care for American Indians and Alaska Natives today and the potential implications of the ACA coverage expansions.
Issue Brief Read MoreObamacare and You: If You Are Uninsured…
The Affordable Care Act, also called Obamacare, creates several new ways to get health coverage. This fact sheet explains how If you are uninsured and not offered health coverage through your job, you may be able to obtain coverage through Medicaid or through a new health insurance marketplace (or exchange) in your state. It is from our Obamacare & You series.
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