Daniel Gingold, MD, MPH, is the lead author of the article titled “Impact of the Affordable Care Act Medicaid Expansion on Emergency Department High Utilizers with Ambulatory Care Sensitive Conditions: A Cross-Sectional Study,” which was published in the May issue of the American Journal of Emergency Medicine. To design and conduct the study, he collaborated with Rachelle Pierre-Mathieu, MD, MPP, Medical Director, Office of Health Care Quality, Maryland Department of Health and Mental Hygiene, Brandon Cole, MD, MPH, Clinical Director, Emergency Department, Prince George’s Hospital Center, Andrew Miller, MD, Assistant Professor of Emergency Medicine, West Virginia University School of Medicine, and Joneigh Khaldun, MD, MPH, the former Medical Director, Baltimore Health Department, and now Medical Director, Detroit Health Department. They found that, after implemenation of the ACA, the proportion of ED users who were high utilizers decreased while the number of visits by high utilizers for ambulatory care sensitive conditions remained stable.