With health insurance premiums on the rise, more MNsure shoppers are buying "bronze" policies that feature lower premiums but larger out-of-pocket costs when they use health care.
Since open enrollment started last month, 50 percent of those buying private plans through the exchange have selected bronze plans, MNsure reported on Wednesday, up from 34 percent a year ago.
The shift could be a sign of more people selecting health plans with out-of-pocket spending requirements they can't afford — a scenario that is a growing concern among health care policymakers.
MNsure board chairman Peter Benner said Wednesday he shares the concern, but argued it's too soon to draw conclusions from the latest numbers. The exchange expects a surge in enrollments leading up to a Dec. 15 sign-up deadline for coverage that starts Jan. 1.
"If our 50 percent choosing bronze are in that half of the population that uses almost no care, then those are rational decisions," Benner said following a board meeting in St. Paul. "If a bunch of those folks, however, are in poor or fair health, then I'm worried."
The enrollment figures released Wednesday show that MNsure is more than one-third of the way to its goal of 30,000 new sign-ups in private health plans for 2016, with 12,180 people enrolling in commercial coverage so far.
Sign-ups in private coverage are important to MNsure's finances, because the exchange funds a chunk of operations through a 3.5 percent tax on the value of premiums for those policies.
Minnesota created the MNsure exchange in 2013 to implement the federal Affordable Care Act, which requires almost all Americans to have health insurance or pay a tax penalty.