Dr. Mehmet Oz, acting Administrator of the Centers for Medicare & Medicaid Services (CMS), has formally notified Tim Walz that every Medicaid billing submission in Minnesota will be audited—and that fraudulent claims will be clawed back and withheld from future federal funding.
In early December 2025, CMS Administrator Dr. Mehmet Oz sent a formal letter and issued a public ultimatum to Minnesota Governor Tim Walz regarding the “systemic fraud” in the state’s Medicaid programs, potentially exceeding $1 billion.
Dr. Oz wrote at the time:
“You’ve probably heard the news by now: Minnesota fraudsters stole over $1 billion from Medicaid. And you deserve an explanation.
Our staff at CMS told me they’ve never seen anything like this in Medicaid — and everyone from Gov. Tim Walz on down needs to be investigated, because they’ve been asleep at the wheel. Based on what we know now, this is a clear dereliction of duty.
First, the facts:
In recent years, Minnesota Medicaid launched several new programs, including Housing Stabilization Services, which helped disabled homeless individuals, and Early Intensive Developmental and Behavioral Intervention, which reimbursed therapy costs for families with autistic children.
Some bad actors in Minnesota’s Somali community decided to game the system. And when they got away with it, they decided to go bigger.