The nation saw an uninsured rate of 9.1% in the first nine months of 2015, according to the latest release of the National Health Interview Survey by the CDC. Estimates are based on data collected from 79,847 people. “In the first nine months of 2015, 28.8 million persons of all ages (9.1%) were uninsured at the time of the interview—7.2 million fewer persons than in 2014, and 16 million fewer than in 2013,” before the ACA’s coverage expansion kicked in.
Among adults ages 18–64, the number of people who were uninsured dropped from 39.6 million in 2013 to 25.3 million in the first nine months of 2015. States that expanded Medicaid coverage under the ACA saw the greatest drop in uninsured, from 18.4% in 2013 to 10% in the first nine months of 2015. States that did not expand Medicaid saw the uninsured rate drop from 22.7% in 2013 to 17.3% in the first nine months of 2015.
Source: National Health Interview Survey, “Health Insurance Coverage: Early Release of Estimates From the National Health Interview Survey,” Feb. 9, 2016