As might be expected, enrollment varies from state to state. The most recent data for which state-by-state age population data are available is 2016. Comparing the number of children enrolled in CHIP or Medicaid with the estimates of the number of children in each state that year reveals those differences. (Circles below are scaled to population.)
In 38 states and the District of Columbia, more than half of the children in the state were enrolled in either CHIP or Medicaid at some point during the year. In only one state, North Dakota, was less than a quarter of the population of people under the age of 18 enrolled in either program at some point. The state with the highest percentage of enrollment was New Mexico, where more than 80 percent of children were enrolled in one of the two programs at some point.
As might be expected, there’s a correlation between poverty rates in a state and enrollment in either program.
About four times as many children were enrolled in Medicaid as in CHIP in 2017. Earlier this month, the House voted to cut funding from the CHIP program.