Arkansas implemented Medicaid work requirements in June of 2018. To maintain coverage in the state, adults ages 30-49 were required to work 20 hours a week, participate in “community engagement” activities, or qualify for an exemption. By April 2019, when a federal judge halted the policy, more than 18,000 adults had lost coverage. As an update to research published in 2018, Benjamin D. Sommers, Lucy Chen, Robert J. Blendon, E. John Orav, and Arnold M. Epstein analyzed the policy effects before, during, and after implementation in this Health Affairs brief.