24, 25, 26Įxpanding access to health services is an important step toward reducing health disparities. 23 Transportation barriers and residential segregation are also associated with late-stage presentation of certain medical conditions (e.g., breast cancer). 22 Research has shown that individuals from racial/ethnic minority groups who had an increased risk for severe illness from COVID-19 were more likely to lack transportation to health care services. Inconvenient or unreliable transportation can interfere with consistent access to health care, potentially contributing to negative health outcomes. 20, 21 For example, physician shortages may mean that patients experience longer wait times and delayed care. 3 Limited availability of health care resources is another barrier that may reduce access to health services and increase the risk of poor health outcomes. Health insurance alone cannot remove every barrier to care. Medicaid patients, for instance, experience access issues when living in areas where few physicians accept Medicaid due to its reduced reimbursement rate. 17 Many health care resources are more prevalent in communities where residents are well-insured, 11 but the type of insurance individuals have may matter as well. The Children’s Health Insurance Program (CHIP) offers sole coverage for 41 percent of children with special health care needs. 16 Medicaid coverage is also critical for enabling children with special health needs or chronic illnesses to access health services. 14 Similarly, providing Medicaid coverage to previously uninsured adults significantly increased their chances of receiving a diabetes diagnosis and using diabetic medications. 13, 14, 15 One study demonstrated that when previously uninsured adults ages 60 to 64 years became eligible for Medicare at age 65 years, their use of basic clinical services increased. In contrast, studies show that having health insurance is associated with improved access to health services and better health monitoring. 11, 12 Similarly, children without health insurance coverage are less likely to receive appropriate treatment for conditions like asthma or critical preventive services such as dental care, immunizations, and well-child visits that track developmental milestones. 10, 11 Uninsured adults are less likely to receive preventive services for chronic conditions such as diabetes, cancer, and cardiovascular disease. Lack of health insurance coverage may negatively affect health. 4, 5 People with lower incomes are often uninsured, 6, 7, 8, 9 and minority groups account for over half of the uninsured population. 2, 3 Out-of-pocket medical care costs may lead individuals to delay or forgo needed care (such as doctor visits, dental care, and medications), 4 and medical debt is common among both insured and uninsured individuals. Inadequate health insurance coverage is one of the largest barriers to health care access, 3 and the unequal distribution of coverage contributes to disparities in health. 2This summary will discuss barriers to health care such as lack of health insurance, poor access to transportation, and limited health care resources, with a special focus on how these barriers impact under-resourced communities. The National Academies of Sciences, Engineering, and Medicine (formerly known as the Institute of Medicine) define access to health care as the “timely use of personal health services to achieve the best possible health outcomes.” 1 Many people face barriers that prevent or limit access to needed health care services, which may increase the risk of poor health outcomes and health disparities.

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