Changes in Insurance Status and Emergency Department Visits After the 2008 Economic Downturn

Objectives As the U.S. economy began its downward trend in 2008, many citizens lost their jobs and, ultimately, their employer‐sponsored health care insurance. The expectation was that many of the newly uninsured would turn to emergency departments (EDs) for their health care. This study was undertaken to determine, first, if changes in the insurance status of the general population were reflected in the ED insurance payer mix and, second, whether there was evidence of an increased reliance on the ED as a continuing source of health care for any payer group(s). Methods This was a retrospective observational study using public data files from the National Hospital Ambulatory Medical Care Survey for Emergency Departments for years 2006 through 2010 (2008 ± 2 years). Changes in the relative proportions of ED visits funded annually by private insurance, Medicaid, Medicare, and self‐pay (uninsured) were analyzed using a logistic model. Poisson regression was used to compare trends in the rates of ED visits for each payer type (i.e., number of ED visits per 100 persons with each insurance type). A linear spline term was used to determine if there was a change in each risk estimate after 2008 compared to the risk estimate before 2008. Results Before 2008, the odds of an ED visit being funded by private insurance increased by 4% per year (odds ratio [OR] = 1.04, 95% confidence interval [CI] = 0.98 to 1.10; p = 0.15), but after 2008 the odds reversed, decreasing by nearly 10% per year (OR = 0.91, 95% CI = 0.85 to 0.97; p = 0.02). Medicaid‐funded visits demonstrated opposite trends with a small decreasing trend of 2% per year before 2008 (OR = 0.98, 95% CI = 0.92 to 1.04; p = 0.52), followed by a significantly increasing trend of 20% per year after 2008 (OR = 1.20, 95% CI = 1.12 to 1.27; p = 0.001). The growth in Medicaid‐funded ED visits was attributable to increased numbers of visits by both pediatric (