“Medically underserved” is a federal designation that identifies places or groups of people who lack adequate access to primary care. The U.S. Health Resources and Services Administration (HRSA) maintains two related categories: Medically Underserved Areas (MUAs), which are geographic regions like counties or clusters of census tracts, and Medically Underserved Populations (MUPs), which are specific groups within a geographic area who face economic, cultural, or language barriers to care. As of March 2024, roughly 15 million people lived within 3,442 designated MUAs across the country.
How an Area Gets the Designation
HRSA scores each area using four factors that together paint a picture of how well a community can access and benefit from health care. Those factors are the ratio of primary care providers per 1,000 residents, the percentage of the population living at or below the federal poverty level, the percentage of residents age 65 and older, and the local infant mortality rate. Each factor is weighted and contributes to a composite number called the Index of Medical Underservice (IMU). The provider ratio carries the most weight (up to 28.7 points), followed by the infant mortality rate (up to 26 points), the poverty rate (up to 25.1 points), and the share of older adults (up to 20.2 points). Areas that score below a set threshold on this combined index qualify for the MUA designation.
The logic behind these four variables is straightforward. Fewer doctors means longer waits and delayed care. Higher poverty means more people who can’t afford treatment. A larger elderly population increases demand on limited resources. And infant mortality serves as a broad indicator of community health, since it reflects the quality of prenatal care, nutrition, and public health infrastructure all at once.
MUAs vs. MUPs vs. HPSAs
These acronyms overlap in ways that can be confusing, but they target different problems. An MUA is about a place: a whole county, a group of neighboring counties, or a cluster of urban census tracts where primary care is scarce. An MUP is about a group of people within a place: populations that face specific barriers even if the broader area has some health care infrastructure. HRSA lists people experiencing homelessness, low-income individuals, Medicaid-eligible residents, Native Americans, and migrant farmworkers as common examples of MUPs.
Health Professional Shortage Areas (HPSAs) are a separate but related designation. While MUAs look at overall access to primary care using the four-factor index, HPSAs focus specifically on whether there are enough providers in a given specialty, including primary care, dental care, and mental health. A single community can hold both designations simultaneously, and many do.
Why the Designation Matters
The MUA and MUP labels are not just bureaucratic labels. They unlock federal funding and resources. Many federal programs use these designations to decide where to direct money, and they serve as the foundation for establishing community health centers (sometimes called Federally Qualified Health Centers, or FQHCs) in areas that need them. Community health centers are required to serve everyone regardless of ability to pay, making them a critical safety net in underserved areas.
Provider recruitment is another major benefit. The National Health Service Corps (NHSC) offers loan repayment to licensed primary care, behavioral health, and oral health providers who commit to working at approved sites in shortage areas for at least two years. HRSA also uses a related designation called Maternity Care Target Areas to distribute maternity care professionals to regions with the greatest need. These incentive programs are one of the primary tools the federal government uses to get doctors, nurse practitioners, and other clinicians into communities that would otherwise struggle to attract them.
What Life Looks Like in Underserved Areas
The consequences of living in a medically underserved area go well beyond inconvenience. Physician shortages mean longer wait times for appointments, which often translates into delayed diagnoses and conditions that worsen before they’re treated. Transportation is a persistent barrier, particularly in rural communities where patients may travel two to three times farther to see a specialist than their urban counterparts. Research has linked transportation difficulties and residential segregation to late-stage diagnosis of conditions like breast cancer.
Rural underserved areas face a distinct set of challenges. Geography, distance, and weather can make routine appointments difficult. Specialist physicians are especially scarce, and rural communities also have less access to reliable health information through local media, which tends to have fewer resources for in-depth health reporting. For residents with limited health literacy, these gaps compound: rural individuals with low health literacy have even less access to trustworthy health information from medical professionals or scientific sources than their urban peers.
Urban underserved areas look different but carry their own burdens. Inner-city census tracts can qualify as MUAs when poverty is concentrated, providers are sparse, and residents face language or cultural barriers that make navigating the health system harder. The designation recognizes that living near a hospital doesn’t guarantee meaningful access to care if you can’t afford it, can’t get time off work, or can’t communicate with providers in your language.
Health Outcomes in Underserved Communities
The gaps in care translate directly into worse health outcomes. Maternal mortality offers one of the starkest examples. The national maternal mortality rate was 32.9 deaths per 100,000 live births in 2021, but for non-Hispanic Black women, that rate was 69.9 per 100,000, nearly 2.6 times higher than for non-Hispanic White women. Women in rural areas face maternal mortality risks up to 50% higher than women in urban settings. In Georgia, which has the second-highest maternal mortality rate in the country at 66.3 per 100,000, Black women in rural counties die at double the rate of their rural White counterparts and 30% more often than Black women in urban areas.
Mental health compounds these disparities. Limited mental health resources in medically underserved areas leave many people, including new mothers dealing with postpartum depression and anxiety, without support. These untreated mental health conditions worsen physical health outcomes as well, creating a cycle that’s difficult to break without expanded services. Extending Medicaid postpartum coverage to a full year has been identified as one policy lever to address chronic conditions and mental health needs that contribute to maternal deaths.
How to Check Your Area’s Status
HRSA maintains a public database where you can look up whether your county or community carries an MUA, MUP, or HPSA designation. The tool is available through HRSA’s shortage designation website and allows searches by address, county, or state. If your area is designated, you may have access to a community health center nearby that offers primary care on a sliding fee scale based on income. If you’re a health care provider, the designation may make you eligible for loan repayment or other recruitment incentives through the NHSC.