Importance: Expanding health insurance coverage, in addition to increasing access to healthcare, affects medical provider revenue. While projections of medical expenditure include increased utilization attributable to improved access, they do not include changes in provider practice and billing...

We estimate the impact of the ACA Medicaid expansion on the intensity of treatment in the emergency department. We conduct a visit level analysis with a difference-in-differences specification for the number of procedures, number of diagnoses, and visit characterization according to the NYU...