Minnesota didn't overpay for COVID-19 tests, audit reports Joe Carlson, Star Tribune A three-month audit of rates paid by the state of Minnesota for COVID-19 testing found no evidence that it overpaid the two private companies running the testing programs, according to a report released Wednesday. Popular Searches The Minnesota Legislative Auditor's Office reviewed the issue after receiving complaints this spring about the state's emergency, no-bid contract with the companies and concerns they were overbilling. The companies — Vault Medical Services of New York and Infinity Biologix (IBX) of New Jersey — have collected and processed millions of COVID-19 tests taken by Minnesotans.