Another insurer sued the U.S. government to recoup unpaid payments under the ACA’s risk-corridor program, but it’s looking less and less likely that the feds will ever pay up.

Sanford Health Plan, the insurance arm of Sioux Falls, S.D.-based Sanford Health, sued the federal government, demanding it pay nearly $9 million in overdue risk-corridor payments for 2014 and 2015. The CMS so far has paid Sanford Health Plan just 15.1% of the amount it owes, according to the complaint filed last week in the U.S. Court of Federal Claims.

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