ST. PAUL — MNsure’s interim CEO says Minnesota’s online health insurance exchange is stable, secure and successful.

According to an advance copy of his testimony before a congressional panel Thursday, Scott Leitz says it’s not news that MNsure’s rollout was rocky last October. But he says he took immediate action after he became interim CEO in December. He says software problems have been resolved and call center wait times came way down by the time open enrollment closed Monday.

Leitz also says MNsure is in the process of selecting a lead vendor to further address its software problems with the goal of making future open enrollment periods a better experience for consumers.

The Republican chairman of the House Oversight Committee asked representatives from several state-run exchanges that have faced start-up troubles to testify.