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The big push to enroll people in new health coverage under the Affordable Care Act has also pulled in tens of thousands of Coloradans who were previously eligible for subsidized government health coverage, but may not have known it. 

It's called “the woodwork effect.” It's when people who were eligible for Medicaid or the Children's Health Plan before Obamacare come out of the woodwork and sign up.

The state and federal government launched a massive effort between October and March to sign up as many people as possible for any kind of health coverage. State officials now say at least 22,700 Coloradans who were eligible for Medicaid or the Children's health plan signed up during that period.

Sue Birch, Colorado's Medicaid Director, says the new marketplace the state set up to help people find private coverage also helped uncover a lot of people who previously qualified for Medicaid.

"We've seen a huge number of our clients come to us through Connect For Health Colorado," Birch says. 

That marketplace is now closed for most people who need private coverage, but Birch still expects to see more people previously eligible for Medicaid get enrolled thanks to Obamacare enrollment efforts.