Chang returned to CHCF in May 2014 from Accretive Health, where she was vice president and medical director of population health solutions for the Chicago-based health care improvement company. She had been the director of CHCF's Better Chronic Disease Care program from 2003 to 2013.
Chang's previous positions include director of the Veteran Health Administration's Center for Quality Management in Public Health; director of the HIV/AIDS program for the Henry J. Kaiser Family Foundation; medical director of the San Francisco Health Plan, a managed health care plan for Medicaid recipients; and director of AIDS Health Services for the San Francisco Department of Public Health, where she oversaw the Ryan White CARE Programs for the city. She also has worked as a medical researcher, examining health disparities in breast cancer care.
She has served on the Managed Risk Medical Insurance Board, which oversees Healthy Families (the state's Children's Health Insurance Program) and California's Pre-Existing Condition Insurance Plan (from September 2006 to May 2011). Chang continues to practice general internal medicine at San Francisco General Hospital as a UCSF faculty member.
Chang holds a bachelor's degree from Amherst College; a master of public health from the University of California, Berkeley; and a medical doctorate from Columbia University's College of Physicians and Surgeons.