Walter Tsou, MD, MPH is a nationally known consultant on public health and health care reform. Currently, he is an Adjunct Professor of Family Medicine and Community Health at the University of Pennsylvania where he teaches health policy at their Center for Public Health Initiatives. He was President of the American Public Health Association in 2005. He served as Health Commissioner of Philadelphia from April 2000 to February 2002. Prior to his appointment, he was the founding Deputy Director for Personal Health Services and Medical Director of the Montgomery County (PA) Health Department from 1991-2000. He has extensive experience in public health and has lectured widely on public health and health disparities.