Colorado has more than halved its uninsured rate since the implementation of the Patient Protection and Affordable Care Act. A survey by the Colorado Health Institute reports that the uninsured rate has dropped from 15.8 percent to 6.7 percent in the past four years.  

Like other states that have seen the most dramatic increases in coverage, Colorado accepted the federally-funded expansion of Medicaid. It also set up its own health insurance exchange, although it is not clear whether that decision played a big role in the boost in coverage.  

The report suggests that the Medicaid expansion has played the most significant role in boosting coverage. The public health program for low-income residents has 450,000 more enrollees now than it did two years ago. As a result, nearly a third of all Coloradans receive coverage through Medicaid now.