After CLIPI, Dorn focused his career on health care issues affecting low-income communities. Working on impact litigation at the National Health Law Program in Los Angeles, Dorn aided in changing the political environment in Sacramento which led to favorable resolutions through legislation. Later, he transitioned to policy advocacy and has played important roles in defeating Medicaid block grants in the 90s, creating income-based Medicaid coverage for children and families, helping create the Children's Health Insurance Program as the policy lead at the Children's Defense Fund, helping pass a bipartisan Health Coverage Tax Program for laid-off workers during the George W. Bush administration, drafting and helping pass several rounds of legislation to simplify and streamline enrollment into health programs, defeating efforts to repeal the Affordable Care Act (ACA), and increasing ACA subsidies for low-income families.