A study says nearly one million kids in the United States live in areas with no local children's doctor. The problem isn't the overall number of children's doctors, but rather, where they are located. Some wealthy areas are oversaturated with pediatricians and family doctors. Other parts of the nation have few or none.By moving doctors, the study suggests, it would be possible for every child to have a pediatrician or family physician nearby.

Mississippi had the highest proportion of children, 42 percent, in low-supply regions, defined as areas with more than 3,000 children per children's doctor. Next were Arkansas, Oklahoma, Maine and Idaho. Areas with an abundance of children's doctors were Washington, D.C., and Delaware. The study appears Monday in the journal Pediatrics.