The ACA Coverage Gap: Who Falls Through, and What Options Actually Exist
The ACA coverage gap describes millions of Americans who earn too little to qualify for subsidized Marketplace coverage but live in states that have not expanded Medicaid to cover them, leaving them without a realistic path to affordable health insurance through either system.
This gap exists not because of anything about the people in it, but because of where they happen to live. More than a decade after the Affordable Care Act passed, which state you live in still determines whether you have access to coverage or not. KFF’s June 2026 research release, Characteristics of Poor Uninsured Adults Ages 19-64 in the ACA Coverage Gap, documents who these adults are and where they live. This post explains the gap, what the data shows, and what realistic options exist for people trying to navigate it.
What is the ACA coverage gap?
When the ACA was written, it assumed every state would expand Medicaid to cover adults earning up to 138% of the federal poverty level, and that Marketplace subsidies would cover everyone above that line. A 2012 Supreme Court ruling made Medicaid expansion optional. In states that declined, a gap opened up between the two systems.
Adults in the gap earn below 100% of the federal poverty level, approximately $15,060 for a single individual in 2026, according to HHS poverty guidelines. That puts them below the income floor for Marketplace premium tax credits, which only begin at 100% FPL. But their state’s Medicaid program typically covers only specific categories, such as pregnant women, parents of minor children, elderly adults, or people with disabilities, not low-income adults generally. So they fall through both floors simultaneously.
Which states still have a coverage gap in 2026?
According to KFF’s Medicaid expansion tracker, approximately ten states have not adopted Medicaid expansion as of 2026. Texas, Florida, Georgia, Mississippi, Alabama, South Carolina, Tennessee, Wisconsin, Kansas, and Wyoming make up most of this list. Texas alone accounts for a disproportionate share of the national gap population because it has both a large uninsured population and a very limited Medicaid eligibility threshold for adults.
If you live in one of these states and are unsure whether you qualify for any coverage, checking directly at HealthCare.gov or your state’s Medicaid agency is the most reliable first step. Eligibility rules are more nuanced than a single income cutoff, and factors like pregnancy, a disability determination, or having a dependent child can change the picture significantly.
Who is in the coverage gap?
KFF’s research shows that the people in the coverage gap are overwhelmingly working adults and their families. A majority live in households where at least one person is employed, often in industries like retail, food service, construction, agriculture, or home care, jobs that frequently don’t include employer-sponsored health coverage and don’t pay enough to afford individual coverage without a subsidy.
These are people doing everything right by any measure. They are working, they are not eligible for public assistance in their state, and the coverage system as designed simply does not have a place for them based solely on where they live. The gap is a structural problem, not a reflection of the people in it.
KFF’s data shows the gap is concentrated heavily in the South and in a handful of large non-expansion states, which reflects the geography of states that have not expanded Medicaid rather than anything about the individuals themselves. The gap spans all ages within the 19 to 64 working-age range, with particular concentration among adults in their 30s, 40s, and 50s who are too young for Medicare and too old to remain on a parent’s plan.
Why can’t someone in the gap buy a subsidized Marketplace plan?
Under current rules, premium tax credits on the ACA Marketplace are only available for income at or above 100% of the federal poverty level. That threshold exists because the ACA’s designers assumed Medicaid would cover everyone below it. In states that expanded Medicaid, that assumption holds and the system works as designed. In non-expansion states, it doesn’t, and the gap is the result.
Someone earning $14,000 as a single adult in a non-expansion state earns too little to qualify for Marketplace subsidies and doesn’t fit their state’s Medicaid categories. They cannot get help from either program under current law.
What realistic options exist for someone in the coverage gap?
There is no perfect substitute for comprehensive coverage, and anyone in this situation should first confirm their actual Medicaid eligibility before assuming they don’t qualify. Pregnancy, disability, and having a dependent child can open pathways that aren’t obvious from a simple income check.
For people who genuinely fall through both systems, here are the options worth understanding:
Community health centers receive federal funding specifically to serve patients regardless of their ability to pay. These federally qualified health centers provide primary care, preventive services, dental care, and behavioral health on sliding-scale fees. HRSA’s Find a Health Center tool covers all 50 states and is the most direct way to locate one near you.
Health sharing ministries, sometimes called a cooperative healthcare model, allow members to share eligible medical costs with a community of other members under written Member Guidelines. For someone in the coverage gap who is generally healthy, a well-established health sharing organization with a long operating history can provide a meaningful layer of protection for major medical events at a lower monthly contribution than any traditional insurance alternative. Health shares are not insurance, their obligation runs to their own Member Guidelines rather than a state-regulated insurance policy, and pre-existing conditions are typically subject to waiting periods. But for a healthy adult with no other options, a reputable health share is a genuinely practical alternative to going entirely uninsured, particularly given the documented financial consequences of being uninsured when a major medical event occurs.
Direct Primary Care memberships offer unlimited primary care visits for a flat monthly fee, typically $60 to $120 for an adult, with no insurance billing involved. DPC does not cover hospitalization or specialist care but addresses the routine and preventive care gap that community health centers may not fully fill. Many people in coverage-gap situations pair a DPC membership with a health share to cover both routine and major medical needs.
Minimum Essential Coverage plans provide limited, preventive-focused coverage that satisfies the ACA’s technical coverage definition but does not include hospitalization or major medical benefits. These are most useful for people who need to satisfy a coverage requirement rather than as standalone protection.
Virtual medicine memberships can provide low-cost access to a physician for common issues and prescription refills, often for $20 to $50 a month, which can help manage routine health needs at low cost without covering major events.
Could the coverage gap close?
Yes, and it has been closing incrementally. Several states that had not expanded Medicaid have done so in recent years, including North Carolina in December 2023. Medicaid expansion remains a state-level decision that can change through legislative action or ballot initiative. Kansas, one of the non-expansion states with a meaningful gap population, passed tax parity legislation for health share members in 2026, reflecting a state-level approach to acknowledging the gap even without closing it through Medicaid expansion. Monitoring your state legislature’s activity and your state’s Department of Insurance for updates is worthwhile if you are in a non-expansion state.
Frequently Asked Questions
What is the ACA coverage gap in simple terms? It is the group of adults, mostly in states that have not expanded Medicaid, who earn too little to qualify for Marketplace subsidies, which start at 100% of the federal poverty level, but don’t qualify for their state’s Medicaid program either. They fall between the two systems through no fault of their own.
How many people are in the coverage gap nationally? KFF’s estimates have generally placed the national coverage gap population at roughly 1.5 to 2 million adults, concentrated heavily in Texas and a handful of other large non-expansion states. The most current figure is available directly on KFF’s coverage gap tracker.
If my state hasn’t expanded Medicaid, should I just assume I don’t qualify for anything? No. Your state’s Medicaid program may still cover you if you are pregnant, have a documented disability, are a parent of a minor child, or meet other specific eligibility criteria. It is worth applying directly through your state’s Medicaid agency or HealthCare.gov rather than assuming ineligibility based on income alone.
Is a health share a realistic option for someone in the coverage gap? For a generally healthy adult with no significant pre-existing conditions, a well-established health sharing organization with a long operating history and transparent Member Guidelines can be a meaningful and practical alternative to going entirely uninsured. Health shares are not insurance and cannot guarantee payment of a medical bill the way a regulated insurance policy can, but they do provide a community-based mechanism for sharing major medical costs that is meaningfully better than having no coverage at all. Reading a specific organization’s Member Guidelines before joining is essential.
Could my state expand Medicaid in the future? Yes. Medicaid expansion is a state-level decision that has changed in multiple states since 2014. Legislative proposals and ballot initiatives have been introduced in many of the remaining non-expansion states. Monitoring your state legislature and Department of Insurance is worthwhile if you are currently in a gap state.
This article is for general informational purposes only and is not insurance, legal, or financial advice. Coverage gap population data and demographic characteristics referenced here come from KFF’s June 2026 release on Characteristics of Poor Uninsured Adults Ages 19-64 in the ACA Coverage Gap and KFF’s Medicaid expansion tracker. Federal poverty level and Marketplace subsidy eligibility rules are based on current CMS and HealthCare.gov guidance. Always confirm your specific Medicaid and Marketplace eligibility at HealthCare.gov or your state Medicaid agency before making a coverage decision.
By the Modern Healthcare Works team