Evidence by topic

Each page summarizes the strongest available studies and official data, labels the type of evidence, and states its limits. Findings that complicate the case for expansion are included.

Evidence labels: Strong design Association Projection Official data

Uninsured rate, residents under 65, 2024: the 12 highest statesHorizontal bar chart. Texas has the highest rate at 19.1 percent; the next highest is Oklahoma at 14.4 percent. Asterisks mark states that had not adopted the ACA Medicaid expansion as of 2026. 0% 6% 12% 18% 24% Texas * 19.1% Oklahoma 14.4% Georgia * 14.0% Florida * 13.7% Nevada 13.7% New Mexico 13.4% Arizona 12.9% Alaska 12.5% Wyoming * 12.5% Mississippi * 12.1% Arkansas 11.3% Tennessee * 11.3%
Uninsured rate among residents under 65, 2024, for the 12 states with the highest rates. Asterisk (*) and dark bars mark states that had not expanded Medicaid as of 2026; Texas is highlighted.1,2
Show the chart data as a table
Data for this chart (SAHIE 2024, under 65, all incomes)
StateUninsured %Margin of errorExpanded Medicaid?
Texas19.1±0.3No
Oklahoma14.4±0.4Yes
Georgia14.0±0.3No
Florida13.7±0.2No
Nevada13.7±0.5Yes
New Mexico13.4±0.6Yes
Arizona12.9±0.4Yes
Alaska12.5±0.7Yes
Wyoming12.5±0.9No
Mississippi12.1±0.5No
Arkansas11.3±0.4Yes
Tennessee11.3±0.3No

Sources for this page

  1. U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE) 2024, state file (2026-08). https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2024-csv.zip [evidence SAHIE-ST]
  2. KFF, coverage gap analysis (list of the 10 states that have not expanded Medicaid) (2026-07-27). https://www.kff.org/medicaid/how-many-uninsured-are-in-the-coverage-gap-and-how-many-could-be-eligible-if-all-states-adopted-the-medicaid-expansion/ [evidence KFF-STATUS]

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