The effects of ObamaCare rollbacks are starting to show — and they aren't pretty.

Four million working-age adults who had health insurance in 2016 don't anymore, a new survey from The Commonwealth Fund, a health-care nonprofit, found. That translates into an uninsured rate of 15.5 percent for adults between 19 and 64 years old, up from 12.7 percent in 2016.

The insurance drop was especially bad for low-income adults, whose uninsured rates rose from 20.9 to 25.7 percent. Rates haven't yet reached pre-Affordable Care Act highs, but they're especially bad in the 19 states that haven't expanded Medicaid, the survey found.

The Commonwealth Fund says the decline is attributable to a lack of legislation to repair weaknesses in the ACA, coupled with deliberate federal actions to weaken it further. Unless something changes, the fund expects uninsured rates to rocket even higher.

The survey of 2,403 adults was conducted from from Feb. 6-March 30. It has a margin of error of 2.8 percentage points. Read more about the results here. Kathryn Krawczyk