Dr. Robert Zarr is a board-certified pediatrician at Unity Health Care, located in Washington, DC, where he cares for low-income and immigrant populations. He served as PNHP president from 2015 through 2016. He is Founder and Medical Director of Park Rx America, a community health initiative to prescribe nature to patients and families to prevent and treat chronic disease and promote wellness. He previously served as the Park Rx Advisor to the National Park Service in his national advocacy to connect patients to parks.
Walter H. Tsou, MD, MPH
Internal Medicine, Public Health
Dr. Walter Tsou is a past president of the American Public Health Association and former health commissioner of Philadelphia. He is a founding member of the National Board of Public Health Examiners and a board adviser to Physicians for a National Health Program. An expert on health reform and health care financing, he frequently briefs members of Congress on health care issues.
Dr. Tsou is a contributing editor of Physician’s News Digest and Pennsylvania Medicine. He is the recipient of numerous awards, including the Public Health Recognition Award from the College of Physicians of Philadelphia, the Leadership Award from the Delaware Valley Healthcare Council, and the Broad Street Pump Award from Physicians for Social Responsibility. He was named Practitioner of the Year by the Philadelphia County Medical Society in 2001.
Dr. Tsou received his medical degree from the University of Pennsylvania and his master’s degree from the Johns Hopkins School of Hygiene and Public Health. He holds an honorary doctorate in medical sciences from Drexel University.