A technical problem related to the MNsure IT system means the state must rerun eligibility determinations for more than 55,000 people in public health insurance programs.
There is no immediate impact for people in the Medicaid and MinnesotaCare programs, state officials said Monday, but there's a chance some in the future will need to find a new source of health insurance.
There's also a chance the state could be at risk financially if people wrongly received coverage through the programs, which are partly funded by the federal government.
But state officials said Monday that it's not clear whether the technical problem rests with MNsure or a data hub that's operated by the federal government.
"We're really working through with [the federal government] on identifying whether the issue resides on this side or that side," said Scott Peterson, the chief information officer for DHS and MNsure with the state's MN.IT agency.
Minnesota launched MNsure in 2013 to implement the federal Affordable Care Act. People use the system to enroll in both public and private health insurance coverage, but the problem disclosed Monday only relates to the public program portion of the system.
To make sure people are eligible for public health insurance, the MNsure IT system communicates with the federal data hub to check information about the income, immigration and disability status of enrollees.
On April 30, state government testing revealed a problem with the transfer of data about applicant income, Peterson said. On Friday, officials determined the scope of the problem, said Chuck Johnson, a deputy commissioner with the state Department of Human Services (DHS).