The US health coverage system is fragmented, leading to gaps in coverage for many individuals. Employer-based insurance is the primary source of coverage for people aged 0-64, but not all workers are offered coverage or can afford it. Medicaid covers many low-income individuals, particularly children, but eligibility for adults is limited in states that have not expanded Medicaid under the Affordable Care Act (ACA). Subsidies are available for Marketplace coverage, but many people cannot afford private coverage without financial assistance.

The cost of health coverage and care is a significant barrier to coverage, with 63.2% of uninsured adults citing unaffordability as the reason for being uninsured. Other reasons include not being eligible for coverage, not needing or wanting coverage, and difficulty signing up. Many workers do not have access to coverage through their jobs, and among those who are offered coverage, cost is often a barrier.

The ACA has not entirely closed the coverage gap, particularly in states that have not expanded Medicaid. This leaves 1.4 million uninsured people without an affordable coverage option. Lawfully present immigrants face a five-year waiting period before qualifying for Medicaid, although some states have opted to cover eligible children and pregnant individuals without a waiting period. Undocumented immigrants are ineligible for federally funded coverage, but some states provide state-funded health coverage.

Recent changes to health care provisions are expected to increase the number of lawfully residing immigrants without health coverage. While financial assistance is available to many uninsured individuals, not everyone is eligible for free or subsidized coverage. In 2023, nearly 6 in 10 uninsured individuals were eligible for financial assistance, but over 4 in 10 were outside the reach of the ACA due to their state not expanding Medicaid, their immigration status, or being deemed to have access to an affordable Marketplace plan or employer coverage.

The lack of affordable health coverage options has significant implications for the country, and it is essential to address these gaps to ensure that all individuals have access to necessary healthcare services. The ongoing challenges in the US health coverage system highlight the need for continued efforts to improve and expand coverage options, particularly for low-income individuals and marginalized communities.