MNsure must refund about $500,000 in federal grant money after wrongly using funds to prepare unused office space for its call center and other staff.
The use of grant funds for that purpose isn't allowed by the federal government, according to a letter this week from MNsure Chief Executive Allison O'Toole to a legislative oversight committee.
"MNsure will either pay that amount back, or have it deducted from future grant payments," MNsure spokesman Shane Delaney said in a statement. "MNsure continues to work with [the federal government] to finalize arrangements for the adjustment."
Minnesota is one of at least four states to use federal grants for purposes that weren't allowed.
The state of Arkansas, for example, is repaying $1 million in grant funds, according to testimony earlier this month from the acting administrator of the federal Centers for Medicare and Medicaid Services (CMS).
The agency is working with at least three other states to recover funds, said CMS acting administrator Andy Slavitt, without identifying Minnesota.
"Our job is to manage every dollar tightly," Slavitt told the U.S. House Energy and Commerce Committee.
The federal government has provided more than $5 billion in grants to states for new health insurance exchanges where individuals can purchase coverage, according to background materials prepared for the House committee. The health law provides tax credits to people who buy coverage through a government-run exchange.