Claire O’Brien is a research associate in the Health Policy Division at the Urban Institute. She uses Medicaid claims data to study racial, ethnic, and geographic disparities in the Medicaid program, studying outcomes such as preventable hospitalizations, well-child visits, and postpartum care access. Additionally, she has expertise in the Affordable Care Act, including providing technical assistance to state agencies and conducting both quantitative and qualitative research on state and federal Marketplaces. She also has experience using national survey data to study mammogram usage, prescription drug access, telehealth, unfair treatment, and patient-provider racial concordance. She has a bachelor’s degree in economics and applied math from the University of Notre Dame and a master of public policy degree from the George Washington University.