NOTE: Gray indicates insufficient data or a suppressed estimate.
Northeastern Arizona, particularly zip codes overlapping the Navajo Nation and other tribal lands, exhibits the highest uninsured rates in the state, with several areas exceeding 30–50%, reflecting persistent gaps in healthcare access among Indigenous communities. The Phoenix and Tucson metropolitan cores display considerable internal variation, with some central urban zip codes reaching 15–20% uninsured alongside adjacent suburban areas below 5%, suggesting sharp socioeconomic stratification at the neighborhood level. Western and southwestern border-region zip codes also trend elevated compared to the statewide median, while affluent suburban corridors such as Scottsdale and the southeast Valley consistently register among the lowest uninsured percentages.
Data: U.S. Census Bureau, 2023 ACS
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