The former vice president's plan allows him to go on offense against both President Donald Trump and against his more progressive rivals.
The Republican president wants to gut the Affordable Care Act. Biden's top rivals for the 2020 Democratic nomination want to go to a single-payer system that could effectively eliminate private insurance.
Biden wants to add a public option to existing ACA insurance exchanges but not eliminate private insurance.
Biden is the only top contender who doesn't back a single-payer model, pitting him against Sens. Bernie Sanders of Vermont, Elizabeth Warren of Massachusetts and Kamala Harris of California.