Williamson TR, et al. - Researchers conducted this study to assess the elective orthopaedic surgery after the affordable care act Medicaid expansion. Between January 1, 2012, and March 31, 2016, researchers questioned the New York Statewide Planning and Research Cooperative System database and identified all patients who underwent the 10 most common elective orthopaedic surgeries. They obtained Medicaid monthly enrollment for the 4-year study period from the NY Department of Health Medicaid Managed Care Enrollment Reports. This query recognised 700,159 individuals who underwent the reviewed orthopaedic surgeries. Out of these individuals, 60,786 were Medicaid recipients. Medicaid enrollment and the number of procedures reimbursed by Medicaid increased significantly during the 4-year study period. In New York State, the Affordable Care Act–supported Medicaid expansion was correlated with an improvement in Medicaid enrollment and a concomitant increase in the utilization of orthopaedic surgery by Medicaid beneficiaries.