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