Undocumented immigrants in the United States access health care through a patchwork of legal protections, public programs, and safety-net providers, though none of these add up to comprehensive coverage. They are excluded from Medicare, standard Medicaid, and the Affordable Care Act marketplace. What remains are emergency rooms required by law to treat them, community health centers that charge based on income, a handful of state-funded programs, and nonprofit hospitals with charity care policies.
Emergency Rooms Are Legally Required to Treat Everyone
The most well-known access point is the emergency department. Under the Emergency Medical Treatment and Labor Act (EMTALA), any hospital that participates in Medicare (which is nearly all of them) must screen and stabilize anyone who walks through the door with a medical emergency. This applies regardless of insurance status, ability to pay, or immigration status. If the hospital lacks the specialized resources to stabilize a patient, it must transfer them to a facility that can. The receiving hospital cannot refuse.
EMTALA is not health insurance. It guarantees stabilizing treatment for emergencies, not ongoing care for chronic conditions like diabetes or high blood pressure. A person having a heart attack will be treated. A person who needs regular monitoring of a manageable condition will not find that through an emergency department, at least not as the system is designed.
A related program, Emergency Medicaid, covers some of this cost. States are required to provide limited emergency Medicaid to people who would qualify for standard Medicaid based on their income but are ineligible due to immigration status. This covers the hospital’s cost for acute emergencies but does not extend to follow-up visits, prescriptions, or preventive care.
Community Health Centers Charge by Income, Not Status
Federally Qualified Health Centers (FQHCs) are one of the most important sources of routine care for undocumented immigrants. There are roughly 1,400 of these organizations operating at over 15,000 sites across the country, often in underserved areas. They are funded in part by the federal government and are legally required to see patients regardless of their ability to pay.
These centers use a sliding fee scale based solely on income and family size. People earning at or below the federal poverty level receive care for free or at a nominal charge. Partial discounts apply to those earning up to twice the poverty level. Federal rules explicitly state that eligibility assessments must be based “only on patient income and family size and not based on any other factors,” which means immigration status and insurance status are not part of the equation. No one is asked for proof of citizenship.
FQHCs provide primary care, dental services, mental health care, and prescription drugs. For many undocumented families, these centers function as a de facto primary care provider, handling everything from childhood vaccinations to diabetes management.
Some States Fund Their Own Coverage Programs
As of mid-2025, 14 states offer some form of state-funded health coverage to immigrants regardless of status. The scope varies widely. Some cover only children or pregnant women, while others have extended coverage to all income-eligible adults.
Several of the most expansive programs are now being scaled back due to state budget pressures. California plans to pause new enrollment for undocumented adults 19 and older starting in January 2026, end state-funded dental benefits in mid-2026, and begin charging monthly premiums to currently enrolled adults. Illinois is ending its state-funded coverage for undocumented adults ages 42 to 64 starting in July 2025 and has already paused new enrollment for those 65 and older. Minnesota plans to end coverage for undocumented adults by 2026. Washington, D.C., has proposed ending coverage for undocumented adults 21 and older.
These programs had represented the broadest access available. Their rollback means that even in the most generous states, coverage is becoming harder to get or keep.
Prenatal Care Has Broader Availability
Pregnancy is one area where coverage extends further than most people expect. Twenty-four states and Washington, D.C., offer public insurance to undocumented pregnant women who meet income requirements. Most of these states use a provision in the Children’s Health Insurance Program (CHIP) that covers the “unborn child,” which allows the state to provide prenatal care without technically enrolling the mother in Medicaid. Some states use their own funds instead. Coverage typically lasts from confirmation of pregnancy through a period after delivery.
Nonprofit Hospital Charity Care
Nonprofit hospitals, which make up the majority of hospitals in the U.S., are required by the IRS to maintain a written financial assistance policy as a condition of their tax-exempt status. These policies must cover all emergency and medically necessary care, spell out eligibility criteria, and be widely publicized. Hospitals must also have a policy prohibiting actions that discourage people from seeking emergency care, such as demanding payment before treatment or allowing debt collectors to operate in emergency departments.
The specifics of each hospital’s charity care program vary. Some offer free care to anyone earning below 200% of the poverty level. Others set different thresholds or offer discounts rather than full write-offs. The key point is that these policies exist at virtually every nonprofit hospital, and patients can apply for them after receiving care. Many undocumented patients who receive emergency treatment and face large bills are eligible for significant reductions or complete forgiveness of those charges.
Private Insurance and Employer Coverage
Undocumented immigrants are barred from purchasing coverage through the ACA marketplace, even at full price with no subsidies. However, they are not prohibited from purchasing private insurance directly from an insurer outside the exchange, and those who work for employers that offer health benefits can receive employer-sponsored coverage. Research shows that some undocumented immigrants do carry private insurance, and those who do actually use fewer health services on average than the amount paid for their coverage.
Why Many Don’t Use the Care That’s Available
Even when services exist, significant barriers keep undocumented immigrants from using them. Fear of deportation is the most powerful deterrent. Federal research has found that the growth of immigration enforcement programs creates a broad climate of fear that leads some immigrants to avoid all contact with public agencies and service providers, even when those services have no connection to immigration enforcement.
The “public charge” rule adds another layer of anxiety. Immigrants hoping to eventually adjust their legal status worry that using public benefits could count against them in future immigration proceedings, making them appear financially dependent on the government. Misconceptions about which programs trigger public charge consequences are widespread, and they deter people from seeking care they are legally entitled to receive.
Language barriers are substantial. Many immigrants do not speak English proficiently, and navigating complex application forms, eligibility rules, and medical bureaucracies in a second language (or without literacy in any language) can be overwhelming. Cultural unfamiliarity with Western medical systems compounds this problem. Practical obstacles like lack of transportation and irregular work schedules that make clinic hours difficult also play a role.
Families with mixed immigration status face a particular bind. A U.S.-citizen child may be fully eligible for Medicaid or CHIP, but an undocumented parent may avoid enrolling them out of fear that the application process, which asks for Social Security numbers and household information, could expose the parent to immigration authorities. Federal data confirms that many eligible children go unenrolled because their parents do not realize the children qualify or are too afraid to apply.
What This Costs and Who Pays
A common assumption is that undocumented immigrants are heavy users of the health care system, but the data consistently shows the opposite. Undocumented immigrants have significantly lower health care expenditures per person than U.S.-born individuals. Despite being far more likely to be uninsured, they do not generate higher rates of uncompensated care than native-born Americans.
On the revenue side, undocumented immigrants contribute billions in federal, state, and local taxes annually. More than a third of their tax contributions go to payroll taxes that fund Social Security, Medicare, and unemployment insurance, programs they are ineligible to use. Research finds that immigrants as a group pay more into the health care system through taxes and insurance premiums than they take out, effectively subsidizing care for U.S.-born citizens.