If insurers flee the marketplaces because the federal government stopped making cost-sharing reduction payments, premiums on the most popular plans on Affordable Care Act exchanges could spike as much as 37 percent, and the number of uninsured Americans could increase by 9.4 million in 2018, according to a report by the Urban Institute, with funding from the Robert Wood Johnson Foundation.

The fate of CSR payments is currently being decided on a month-to-month basis. The Trump administration and the House of Representatives have requested delays on the hearing of the House’s 2016 lawsuit against the former Obama administration over the CSRs, arguing that the Treasury could not reimburse insurers for these subsidies because the funds had not been explicitly appropriated by Congress.

“The federal government is now paying the insurer reimbursements one month at a time with no commitment to continue,” the study says. “Congress could appropriate funds to make the payments and end the uncertainty, but so far it has not exercised this power.”

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Katie Kuehner-Hebert

Katie Kuehner-Hebert is a freelance writer based in Running Springs, Calif. She has more than three decades of journalism experience, with particular expertise in employee benefits and other human resource topics.