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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Health Coverage by Race and Ethnicity: The Potential Impact of the Affordable Care Act
Executive Summary One of the key goals of the Affordable Care Act (ACA) is to reduce the number of uninsured through a Medicaid expansion and the creation of health insurance exchange marketplaces with advance premium tax credits to help moderate-income individuals pay for this coverage. Given that people of color…
Issue Brief Read MoreEnsuring the Health Care Needs of Women: A Checklist for Health Exchanges
To inform the development of the state health insurance Exchanges under the Affordable Care Act, this checklist identifies key coverage, affordability and access issues that are important for women. Based on lessons learned from women’s health research and the Massachusetts experience, the checklist considers essential health benefits, implementation of no-cost preventive services including contraception, provider networks and affordability, outreach and enrollment efforts, and the importance of including gender and other demographic characteristics in data collection and reporting standards.
Issue Brief Read MoreKey Facts on Health Coverage for Low-Income Immigrants Today and Under the Affordable Care Act
Beginning in 2014, the Affordable Care Act will expand Medicaid and create new health insurance exchanges that will significantly increase coverage options for citizens and lawfully present immigrants. This brief provides an overview of health coverage for immigrants today and their new coverage options under health reform. Fact Sheet (.pdf)
Fact Sheet Read MoreMedicaid: A Primer – Key Information on the Nation’s Health Coverage Program for Low-Income People
This Medicaid primer provides an overview of the nation’s largest health coverage program, which covers more than 62 million low-income individuals, including children and families, people with disabilities and seniors who are also covered by Medicare. Medicaid also is the dominant source of the country’s long-term care financing. The program will expand significantly under the Affordable Care Act in 2014.
Issue Brief Read MoreJAMA Forum: Great Expectations and the Affordable Care Act
“Great Expectations and the Affordable Care Act,” Larry Levitt’s February 2013 post for The JAMA Forum, is now available online.
Perspective Read MoreThe Single Streamlined Application Under the Affordable Care Act: Key Elements of the Proposed Application and Current Medicaid and CHIP Applications
The Affordable Care Act (ACA) makes a number of changes to simplify the Medicaid enrollment process. As part of these changes, beginning in 2014 all states will be required to use a single, streamlined application provided by the U.S. Secretary of Health and Human Services unless they receive approval to…
Report Read MoreImplementation of Affordable Care Act Provisions to Improve Nursing Home Transparency, Care Quality, and Abuse Prevention
The Affordable Care Act (ACA) is the first comprehensive legislation since the Nursing Home Reform Act, part of the Omnibus Budget Reconciliation Act of 1987 (OBRA ’87), to expand quality of care-related requirements for nursing homes that participate in Medicare and Medicaid and improve federal and state oversight and enforcement.…
Report Read MoreGetting into Gear for 2014: Findings From a 50-State Survey of Eligibility, Enrollment, Renewal and Cost-Sharing Policies in Medicaid and CHIP, 2012-2013
This 50-state survey provides a snapshot of Medicaid and CHIP enrollment and eligibility policies and procedures and highlights the changes that states will need to make in their programs to prepare for the ACA in 2014.
Report Read MoreVisualizing Health Policy: Health Coverage Under the Affordable Care Act (ACA)
Related ResourcesStudy Highlights Role of Geography and Plan Shopping Under Medicare Premium Support SystemMedicare Part D: A First Look at Part D Plan Offerings in 2013The Medicare Prescription Drug Benefit – An Updated Fact SheetOnline Consumer Guide to Medicare The latest Visualizing Health Policy infographic is a flowchart illustrating the mechanisms…
Report Read MoreMedicaid Eligibility, Enrollment Simplification, and Coordination under the Affordable Care Act: A Summary of CMS’s March 23, 2012 Final Rule
This brief provides a summary of the Centers for Medicare and Medicaid Services’ (CMS) March 23, 2012 final rule to implement the ACA provisions relating to Medicaid eligibility, enrollment simplification and coordination. The rule, which is effective Jan. 1, 2014, lays out procedures for states to implement the Medicaid expansion…
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