Gov. Newsom’s proposed budget has proposed providing the final missing piece and the largest group remaining: all low-income adults ages 26 to 49, regardless of immigration status. That move would represent the state’s biggest coverage expansion since the Affordable Care Act’s implementation, and comprises about 670,000 people, Lucia said.

This year, nearly 3.2 million Californians will still be uninsured, and undocumented residents make up the largest portion of that group. In 2022, two-thirds of undocumented Californians under the age of 65 will still be uninsured, they found, with even more seniors who weren’t included in the modeling.