My mom got flagged by a system like this a few years ago. The state was in a financial bind, so they hired an algorithmic auditing firm to claw back public fund

My mom got flagged by a system like this a few years ago. The state was in a financial bind, so they hired an algorithmic auditing firm to claw back public funds from medical professionals who billed Medicare/Medicaid. They had been lax about the documentation they accepted so, they were able to claim just about anyone was missing years worth of legally required documents. She did in-home medical evaluations for rural communities and worked long hours. The amount of hours and miles she billed set off red flags, so they sent her a bill for tens of thousands of dollars and threatened her with criminal prosecution. It took her months and who knows how much in legal costs to fight it.