The federal government will choose health plans for hundreds of thousands of consumers whose insurers have left the Affordable Care Act marketplace unless those people opt out of the law’s exchanges or select plans on their own, under a new policy to make sure consumers maintain coverage in 2017.

“Urgent: Your health coverage is at risk,” declares a sample “discontinuation notice,” drafted by the government for use by insurers. It tells consumers that “if you don’t enroll in a plan on your own, you may be automatically enrolled in the plan picked for you.”

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