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Obamacare

Statistics report on the Affordable Care Act

This report has been compiled to provide statistical information on the Affordable Care Act otherwise known as Obamacare. It shows what has happened in the decade since the health reform was signed into law, in areas such as health insurance coverage, Medicaid expansion, positive impact, areas of improvement, value-based payment programs, and public opinions.

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Table of contents

Introduction: high uninsured rates before ACA

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  • Basic Statistic Number of people in the U.S. without health insurance 1997-2024
  • Premium Statistic Percentage of people in the U.S. without health insurance 1997-2025
  • Premium Statistic Percentage of U.S. Americans with any health insurance 1990-2024
  • Premium Statistic Share of people in the U.S. without health insurance by age 1997-2025
  • Premium Statistic Share of U.S. adults without health insurance by poverty level 2019-2025

Current picture: Medicaid expansion vs non-expansion states

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  • Premium Statistic Share of U.S. adults without health insurance by Medicaid expansion status 2010-2025
  • Premium Statistic U.S. adults with public health insurance by Medicaid expansion status 2010-2025
  • Premium Statistic U.S. adults with private health insurance by Medicaid expansion status 2010-2025
  • Basic Statistic Uninsured U.S. children distribution and rate by Medicaid expansion status 2020
  • Basic Statistic Medicaid income eligibility limits as % FPL as of Jan 2024, by state expansion status

Current picture: areas of improvement

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  • Basic Statistic Number of uninsured U.S. adults in the Medicaid coverage gap in 2021
  • Basic Statistic Distribution of U.S. adults in the Medicaid coverage gap in 2021, by state
  • Basic Statistic Number of uninsured U.S. adults in the Medicaid coverage gap in 2021, by state
  • Basic Statistic Number of U.S. people in the 'family glitch' in 2019, by select demographics
  • Basic Statistic Share of U.S. people in the 'family glitch' in 2019, by select demographics
  • Basic Statistic American Rescue Plan removes ACA subsidy cliff for two years starting 2021

Positive impact of ACA

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  • Basic Statistic Number of studies that find positive effects of Medicaid expansion as of 2021
  • Basic Statistic Number of ACA-related enrollments in the U.S. 2014-2024
  • Basic Statistic Impact of Medicaid expansion on mortality in the U.S. 2014-2017
  • Basic Statistic Impact of Medicaid expansion on mortality in the U.S. 2014-2017, by state
  • Basic Statistic Traditional Medicaid savings from Medicaid expansion in select U.S. states as of 2020

Payment & delivery reform: Accountable Care Organizations

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  • Premium Statistic Number of ACOs in Medicare Shared Savings Program 2012-2025
  • Premium Statistic Number of beneficiaries assigned to ACOs in Medicare Shared Savings Program 2012-2025
  • Basic Statistic Number of ACO participants in Medicare Shared Savings Program 2025
  • Premium Statistic Earned savings of ACOs in Medicare Shared Savings Program 2012-2021
  • Premium Statistic Gross federal savings from ACOs in Medicare Shared Savings Program 2013-2023
  • Basic Statistic Overall quality scores of ACOs in Medicare Shared Savings Program 2012-2021

Payment & delivery reform: HRRP & HACRP

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  • Basic Statistic Number of U.S. hospitals Medicare punished for high readmissions in FY 2023
  • Basic Statistic Number of U.S. hospitals Medicare punished for high readmissions FY2022, by years
  • Basic Statistic Number of U.S. hospitals Medicare punished for high readmissions FY 2015-2023
  • Basic Statistic U.S. hospitals Medicare punished for high hospital-acquired conditions FY 2015-2022

Public opinion

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  • Basic Statistic U.S. opinion on the ACA April 2010-March 2023
  • Premium Statistic Share of U.S. adults who approved or disapproved of ACA in 2020, by party
  • Basic Statistic U.S. public opinion: overturning ACA/Obamacare 2020, by party
  • Basic Statistic U.S. public opinion: overturning ACA's pre-existing condition protection 2020
  • Basic Statistic Public opinion on intentions of health care plans U.S. January 2020
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