While not a big jump from the previous 4.7 percent, the increase is striking, as the uninsured rate typically remains stable or drops during times of economic growth.

Verma said the program's myriad troubles underscore why she opposes calls for dramatically widening eligibility for Medicare.

After two years of double-digit price hikes, the average ACA premium will drop by 1.5 percent for 2019. What's behind the drop?

Doctors say it's an unnecessary change that could end up costing patients more.

An estimated 8.8 percent of the population, or about 28.5 million people, did not have health insurance coverage at any point in 2017.

ACOs were expected to save the government nearly $5 billion by 2019 but haven't come anywhere close to meeting that goal.

CMS is cutting money to ACA navigators from $36 million to $10 million for the upcoming 45-day enrollment period.

It's not yet clear how a judge's ruling invalidating the Trump administration's approval of Kentucky's plan affects other states.