Previously, Charles spent 15 years at the UCLA Center for Health Policy Research, with six years as director of the Health Insurance Studies Program and nine years as a senior research scientist. Charles regularly appears on numerous NPR and other talk radio programs to discuss health care reform issues and their impact, including "Press Play," "Take Two" and "Air Talk." Her work has received national media attention, including CBS Online News, NBC Nightly News, The New York Times, The Wall Street Journal, and Politico
Charles received her master's degree in public policy (health and regional development) from the UCLA Luskin School of Public Affairs and her PhD in health services (health policy) from the UCLA Fielding School of Public Health.
About one in four Californians are immigrants, and half are from Latin America. Nearly 10% of California’s workforce are undocumented. Nearly three times more Hispanics/Latinx (about 12%) compared to their white peers were uninsured in California, according to a 2020 report from UCLA Center for Health Policy Research.