The presence of the audit itself appeared to have a chilling effect on bad actors. As the 14 high-risk programs gained national attention in late 2025, inappropriate billing declined by nearly 30%, resulting in $165 million in “cost avoidance”.
A high-stakes audit of Minnesota’s Medicaid system released Friday reveals that more than $1 billion in taxpayer-funded healthcare payments were exposed to potential fraud, waste, and abuse over a four-year window.
The report, produced by outside consultant Optum, examined 46 months of fee-for-service claims data ending in late 2025. While the audit identified $52.3 million in “direct recoveries”—funds that can be recouped due to explicit policy violations—the most alarming figure is the $1.03 billion in “potential recoveries” tied to systemic vulnerabilities and ambiguous state rules.
Systemic Gaps and ‘Impossible Days’
The assessment uncovered recurring patterns where billing surpassed the physical limits of time and geography, or bypassed necessary safeguards:
- “Impossible Days”: Investigators flagged “impossible” scenarios where providers billed for timed services exceeding 24 hours in a single calendar day.
- Questionable Travel: In transportation services, the audit identified claims for over 2.5 hours of travel time in cases where one unit billed is supposed to equal one minute.
- Missing Authorizations: Claims were routinely processed and paid even when the required prior authorization was not present during submission.
- Data Silos: A major vulnerability exists because the data needed to verify a claim is often housed in a separate system from the one that pays the claim. This “blind spot” impacts Housing Stabilization Services , Non-Emergency Medical Transport , Individualized Home Support , and Adult Companion Care.
- Phantom Billing: The audit highlighted “billed but unprovided” services, particularly in Housing Stabilization Services, where the state previously suspended 50 providers due to ongoing investigations.
The Top Offenders
Of the 14 high-risk programs evaluated, financial exposure was heavily concentrated in four primary sectors:
- Autism Services (EIDBI): Early Intensive Developmental and Behavioral Intervention showed the highest exposure, with $1.05 billion vulnerable due to vague policies. To identify these gaps, investigators ran 29 separate analytical tests on this program alone.
- Individualized Home Supports (IHS): This program saw $429.6 million in potential recoveries across nearly 1.9 million vulnerable claim lines.
- Night Supervision (NS): While flagged for $196.2 million in potential exposure, this program was also a leader in “direct recoveries,” with $11.5 million already identified for recoupment due to clear rule-breaking.
- Transportation (NEMT): Non-Emergency Medical Transportation led the state in immediate recoveries, with $23.9 million identified for recoupment. Its additional “potential” exposure stands at $17.3 million.
- Residential Treatment (IRTS): Intensive Residential Treatment Services showed $42.7 million in exposure. A key vulnerability here included billing for residential services while recipients were concurrently enrolled in other high-risk programs.
The “Watch” List and Automation
The presence of the audit itself appeared to have a chilling effect on bad actors. As the 14 high-risk programs gained national attention in late 2025, inappropriate billing declined by nearly 30%, resulting in $165 million in “cost avoidance”.
Moving forward, the state is transitioning to Phase 2 of the initiative, which began in late January 2026. This phase focuses on automating “pre-payment analytics,” essentially creating a digital filter to block suspicious claims—like “Impossible Days”—before the checks are ever mailed.
As of mid-January, Optum had already identified high-risk provider findings totaling over $21 million for immediate state review.
