In this video, Pamela Riley, M.D., senior program officer for The Commonwealth Fund's vulnerable populations program, outlines the need to improve care for vulnerable groups, which include low-income people, people without insurance, and people in racial and ethnic minority groups. Riley explains how the Affordable Care Act will help to improve the delivery of care and health outcomes for these groups. Medicaid expansion under the Affordable Care Act, Riley adds, will bring coverage to millions who need it and also help to sustain safety-net facilities.