Up to 28 million Americans a year might have coverage disrupted at least once, study finds Under the new Affordable Care Act, the health reform package signed into law by President Barack Obama last March, millions of Americans whose income fluctuates during the year may lose health insurance for periods of time as their eligibility for different programs changes. The authors of a new study appearing in the February issue of Health Affairs estimated that as many as 28 million U.S. adults might "churn" in and out of health insurance programs during the course of a year, sometimes losing coverage...