Corinne Lewis, L.M.S.W. is the senior research associate in The Commonwealth Fund’s Delivery System Reform Program, where she performs a variety of duties including writing, editing, and research, as well as general program-wide coordination and management. She was promoted from research associate in July 2019. Before joining the Fund, she was a health research analyst with Mathematica Policy Research, Inc., where she gained extensive experience in mixed methods research on federal demonstrations of innovative models of care. While at Mathematica, Ms. Lewis worked on a number of projects relevant to delivery system reform, including a toolkit for state Medicaid programs on provider network adequacy, the evaluation of the Independence at Home demonstration, and a project designing an evidence-based geriatric home visiting model to prevent medical and psychosocial issues among older adults. Before joining Mathematica, she was a project coordinator at the Laboratory for Youth Mental Health at Harvard University and had internships with the Centers for Medicare and Medicaid Services and NYU Augustana Center at NYU Lutheran Medical Center. Ms. Lewis holds a B.A. in psychology from Boston University and a master of science in social policy from Columbia University’s School of Social Work.