Underserved groups refer to populations that do not have adequate access to medical care. This includes rural, elderly, low-literacy, blue collar, and poor populations. Minorities per se are not included, but often belong to one or more or the included categories. Similarly, people with special needs and homeless people also may belong to one or more of the included categories.
The U.S. Health Services Administration (HRSA) designates medically underserved areas/populations as areas or populations having too few primary care providers, high infant mortality, high poverty, or a high elderly population.