The Medicaid gap is a situation where people earn too much to qualify for Medicaid in their state but too little to get financial help buying insurance through the federal marketplace. About 1.6 million uninsured Americans are currently stuck in this gap, left without any affordable path to health coverage.
How the Gap Was Created
The Affordable Care Act was designed as a two-part system. Medicaid would cover everyone earning up to 133% of the federal poverty level, and tax credits would help people earning between 100% and 400% of the poverty level buy private insurance on the marketplace. These ranges intentionally overlapped so no one would be left out.
In 2012, the Supreme Court ruled that states couldn’t be forced to expand Medicaid. Ten states still haven’t. In those states, the old Medicaid rules remain in place, and eligibility cutoffs for adults are often far below 100% of the poverty level. Parents may qualify only if their income is a fraction of the poverty line, sometimes as low as the income thresholds that were set in the mid-1990s. Childless adults without a disability frequently don’t qualify for Medicaid at any income level, regardless of how little they earn.
The marketplace subsidies, meanwhile, were built assuming everyone below 100% of the poverty level would be on Medicaid. So those subsidies start at 100% of the poverty level and don’t reach lower. The result: if you live in a non-expansion state and earn less than roughly $15,000 a year as a single adult, you may be too “wealthy” for Medicaid and too poor for marketplace help. That’s the gap.
Which States Have the Gap
Forty-one states (including Washington, D.C.) have adopted Medicaid expansion. The 10 that haven’t are concentrated in the South and include Florida, Georgia, Mississippi, South Carolina, Kansas, Wisconsin, Wyoming, and Texas, among others. Several of these states have seen repeated legislative attempts to expand. Kansas tried for seven years before its governor stopped proposing expansion. Wisconsin’s governor included expansion in a 2025 budget proposal, but the legislature stripped it out. Mississippi’s House passed expansion legislation in 2024, but the bill died before reaching a final vote.
Some non-expansion states are pursuing partial workarounds. Georgia operates a waiver program called “Pathways to Coverage” that ties Medicaid eligibility to work requirements. South Carolina has proposed a similar waiver that would extend coverage to parents earning between 67% and 100% of the poverty level, but only if they meet employment conditions. Florida has an organizing committee working toward a ballot initiative on Medicaid expansion, though voters wouldn’t see it until 2028.
Who Falls Into the Gap
The gap disproportionately affects working people and people of color. About half of the 2.2 million people estimated to be in the gap (including some who have other coverage) were employed as of 2019, and 62% were either working or actively looking for work. These are largely people in low-wage jobs that don’t offer employer-sponsored insurance: home health aides, restaurant workers, retail employees, farm laborers.
The racial breakdown is stark. While people of color make up 41% of the non-elderly adult population in non-expansion states, they represent 60% of the people in the coverage gap. Black and Latino adults each account for 28% of the gap population, roughly 617,000 and 613,000 people respectively. White adults make up about 893,000 of those affected. The gap reinforces existing health disparities that already fall hardest on communities of color in Southern states.
What It Means for Health and Finances
Being uninsured isn’t just an administrative problem. Uninsured rates in non-expansion states are nearly double those in expansion states: 14.1% compared to 7.6%. People without coverage skip care they need. Nearly one in four uninsured adults reported not getting necessary medical treatment in 2023 because of cost. That means infections go untreated, chronic conditions like diabetes and high blood pressure go unmanaged, and cancer screenings don’t happen.
The financial consequences compound over time. Without insurance, a single emergency room visit or unexpected diagnosis can generate thousands of dollars in medical debt. People in the gap often rely on community health centers, charity care, or simply go without. Preventive care, the kind that catches problems early when they’re cheaper and easier to treat, is far less common among uninsured adults than among those with any form of coverage.
Why It Hasn’t Been Fixed
Closing the gap requires either state or federal action, and both have stalled. At the state level, expansion remains a politically charged issue. Even in states where governors or one legislative chamber have supported it, the other chamber or key committees have blocked votes. The pattern has repeated for over a decade in states like Kansas and Wyoming.
At the federal level, Congress could change marketplace subsidy rules to extend tax credits below 100% of the poverty level, effectively closing the gap without requiring state cooperation. This approach has been proposed in various forms but hasn’t passed. The gap persists because it exists at the intersection of two systems, one controlled by states and one by the federal government, and neither has moved to bridge it.
For the 1.6 million people currently in the gap, the practical reality is limited. Checking eligibility for other Medicaid categories (pregnancy, disability, having dependent children) is worth doing, since some pathways exist outside the expansion population. Community health centers provide care on a sliding fee scale based on income. But comprehensive coverage, the kind that includes prescriptions, specialist visits, and hospital care, remains out of reach without expansion or a federal fix.