Using a survey fielded by the RAND American Life Panel, we estimate a net gain of 9.3 million in the number of American adults with health insurance coverage from September 2013 to mid-March 2014.
The survey, drawn from a small but nationally representative sample, indicates that this significant uptick in insurance coverage has come not only from enrollment in the new marketplaces established under the Affordable Care Act (ACA), but also from new enrollment in employer coverage and Medicaid.
Put another way, the survey estimates that the share of uninsured American adults has dropped over the measured period from 20.5 percent to 15.8 percent. Among those gaining coverage, most enrolled through employer-sponsored coverage or Medicaid.
Although a total of 3.9 million people enrolled in marketplace plans, only 1.4 million of these individuals were previously uninsured. Our marketplace enrollment numbers are lower than those reported by the federal government at least in part because our data do not fully capture the surge in enrollment that occurred in late March 2014.
Using the RAND American Life Panel, a nationally representative panel of individuals who regularly participate in surveys, we have conducted monthly surveys since November 2013 about insurance choices and public opinion. This particular survey work—which is ongoing—is known as the RAND Health Reform Opinion Study(RHROS).
We match these data with data collected in September 2013 about insurance choices. The results presented here are based on 2,425 adults between the ages of 18 and 64 who responded in both March 2014 and September 2013.
People shift from one type of health insurance to another for a number of reasons, such as job changes or marital status changes. Our survey work can’t say for certain which of these shifts are due to the ACA and which are due to other factors, but we can draw some limited conclusions.