Expanding Risks: Medicaid Expansion and Data Security

Abstract

The Patient Protection and Affordable Care Act of 2010 led to the largest expansion of healthcare coverage since the instantiation of Medicare and Medicaid in 1965. Yet, limited attention has been given to the security aftereffects of the statute, specifically the potential for malfeasance in the form of consumer fraud and identity theft resulting from the vast influx of new patient data residing in various and highly dispersed sources. In this work, we fill this gap by exploiting the phased expansion of Medicaid into different states at different times. Using a difference in difference approach, we explore the data security-related aftereffects of the law. Results indicate a significant decrease in claims of consumer fraud after the expansion of Medicaid, with no robust effect on identity theft. In empirical extensions, we find a material drop in data breaches and compromised records after the expansion of Medicaid. Taken in sum, these findings suggest that the expansion of Medicaid had a consequential effect on the security of consumer data and created significant positive externalities for consumers.