Why is it that some US citizens are without health care coverage?

Some U.S. citizens lack health care coverage due to a variety of factors, including high costs of insurance premiums, gaps in eligibility for government programs like Medicaid, and employment-based insurance dependence. Additionally, many individuals may not qualify for subsidies under the Affordable Care Act or may be unaware of their options. Socioeconomic disparities and systemic issues also contribute to barriers in accessing affordable health care.