Characteristics of Medicaid-Covered Emergency Department Visits Made by Nonelderly Adults: A National Study

Costs and Trends of Emergency Department Utilization Pre-ACA and Post-ACA: Evidence From a Rural Georgia Hospital

BACKGROUND

A high volume of emergency department (ED) visits in the rural United States may be the result of barriers to accessing primary care. The Affordable Care Act (ACA) increased the number of insured, which may improve patient access to primary care and therefore reduce ED utilization. The objective of this study is to estimate the trends and cost of ED utilization pre-ACA and post-ACA implementation in a rural United States.

DATA AND METHODS

We use 2009-2013 ED utilization data from a rural Georgia hospital to estimate trends and costs by demographic characteristics, referring source, and payor information. T tests and log-linear regression models are used to assess the sociodemographic factors impacting ED inflation-adjusted costs before (2009-2010) and after ACA (2011-2013) implementation.

RESULTS

During 2009-2013, 39,970 ED encounters were recorded with an average cost (AC) of $2002 per visit. Results indicate that during pre-ACA, on average, 8702 encounters were recorded per year with an AC of $1759. During post-ACA, there were 7521 annual visits, with an annual AC of $2241. Regression model results indicate that AC were significantly higher for men, older adults, nonblack patients, those with private insurance, and during the post-ACA period.

CONCLUSIONS

Results suggest that post-ACA, declining ED visits may be due to more patients with insurance accessing primary care instead of ED. We further hypothesize that increased AC during this period may be due to ED visits being of an emergent nature, which require more resources to treat. Further comprehensive investigation is warranted to study the impact of ACA on ED utilization for nonemergency purposes among rural and nonrural hospitals.

Predicting Frequent Emergency Department Use by Pediatric Medicaid Patients

The objective of this study was to determine the patient characteristics and health care utilization patterns that predict frequent emergency department (ED) use (≥4 visits per year) over time to assist health care organizations in targeting patients for care management. This was a retrospective, population-based study of 13,265 Medicaid children aged 0-20 years who were attributed to a single pediatric accountable care organization for at least 2 consecutive years between June 2012 and May 2015. Year-to-year persistence as a frequent ED user was 36.3% (95% confidence interval [CI]: 33.4 to 38.4), which does not support the notion that once a frequent user, always a frequent user. Hence, interventions to reduce frequent ED use may appear to be effective when ED use would have regressed toward the mean without any intervention. At an individual patient level, predictability of frequent ED use was 0.437 (95% CI: 0.358 to 0.485) across frequent ED users of all ages compared with 0.723 (95% CI: 0.435 to 0.824) for those aged <1 year. Accordingly, this latter group may be a better target for interventions than frequent ED users generally.