Uninsured percentage by Medicaid expansion status U.S. 2010-2021

In 2021, one fifth of U.S. adults in non-Medicaid expansion states did not have health insurance. In comparison, just one in ten of U.S. adults in Medicaid expansion states were uninsured. There was a difference in the uninsured rate between these states even before Medicaid expansion, but the expansion due to ACA has made the gap much larger. This statistic shows the percentage of adults aged 18-64 years without health insurance in the United States from 2010 to 2021, by state Medicaid expansion status.

Share of adults aged 18-64 years without health insurance in the United States from 2010 to 2021, by state Medicaid expansion status

Characteristic	Medicaid expansion states	Non-Medicaid expansion states
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Release date

May 2022

More information

Region

United States

Survey time period

2010 to 2021

Age group

18-64 years

Supplementary notes

For 2019, states moving forward with Medicaid expansion included: Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Hawaii, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Dakota, Ohio, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia, Washington, and West Virginia. The District of Columbia also moved forward with Medicaid expansion. Beginning with 2020, two states were added to this grouping: Idaho and Utah. Beginning with 2021, Nebraska was added to this grouping.
For 2019, states not moving forward with Medicaid expansion included: Alabama, Florida, Georgia, Idaho, Kansas, Mississippi, Missouri, Nebraska, North Carolina, Oklahoma, South Carolina, South Dakota, Tennessee, Texas, Utah, Wisconsin, and Wyoming. Beginning with 2020, two states have been removed from this grouping: Idaho and Utah. Beginning with 2021, Nebraska was removed from this grouping.
People were defined as uninsured if they did not have any private health insurance, Medicare, Medicaid, Children’s Health Insurance Program (CHIP), state-sponsored or other government-sponsored health plan, or military plan. People also were defined as uninsured if they had only Indian Health Service coverage or had only a private plan that paid for one type of service, such as accidents or dental care.
This statistic was assembled using previous releases from the same source.

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