🤖 AI as Weapon — Double Featured
The nH Predict section appears here under Scienter because the 90% error rate — deployed knowingly — is the clearest evidence that UHC knew the denials were wrong. The same technology appears under Damages & Causation documenting what it produced, and the counter-tools being developed in response.
Government Investigations & Scrutiny
FTC Accuses CVS, Cigna, UnitedHealth of Abusing Middleman Role
Following a nearly two-year investigation, the FTC formally accused the PBM units of CVS Health (Aetna), Cigna Group (Express Scripts), and UnitedHealth Group (Optum Rx) of anticompetitive practices that inflate drug costs and restrict patient access to medicines.
- The three companies control approximately 80% of the PBM market. The FTC's vote to pursue action was 3-0.
- Allegations include using complex contracts, rebates, and fees to steer patients to their own affiliated pharmacies and disadvantage competitors — increasing PBM profits at the expense of patients and payers.
Massachusetts AG Sues UHC for $100M+ Medicaid Fraud — Upcoded Risk Scores for 10 Years
Massachusetts Attorney General Andrea Joy Campbell filed suit in Suffolk Superior Court alleging UnitedHealthcare falsely manipulated the health status of MassHealth Senior Care Options members — seniors 65 and older on Medicaid — to receive higher per-member payments from the state. The alleged scheme ran from January 2015 to December 2025: a decade of documented upcoding.
- UHC classified members at higher care levels — including levels reserved for members with behavioral health or substance use disorders — despite members lacking corresponding diagnoses or treatments.
- The complaint estimates at least $100 million in excess payments. Under the Massachusetts False Claims Act, that amount could be tripled to $300 million.
- UHC is the largest provider of Senior Care Options plans in Massachusetts, covering approximately 25,000 of the program's 75,000 enrollees at a cost of roughly $3 billion annually to the state.
- UHC called the lawsuit "meritless." Their spokesperson: "The Attorney General is simply wrong."
The Scienter Connection
AG Campbell co-led the 39 AGs bipartisan letter to Congress in April 2025 asking for federal PBM reform. She simultaneously filed this state lawsuit against UHC two months later. The same AG who told Congress "congressional action is warranted" is also pursuing what state law allows — because she knows what state law cannot reach. This is what S.3829's investigative authority was built to extend.
Three Simultaneous DOJ Investigations — Antitrust, Civil Medicare Fraud & Criminal Medicare Fraud
As of June 2025, UnitedHealth Group was operating under three concurrent Department of Justice investigations — a combination that is extraordinary for any company and represents the full spectrum of federal enforcement authority being applied simultaneously.
1. Antitrust Investigation — Feb 2024
DOJ opened antitrust probe into UHG's market dominance and competitive practices. UHG employs or is affiliated with 10% of all physicians in the U.S.
2. Civil Medicare Fraud Investigation — Feb 2025
DOJ investigators interviewing former employees about upcoding practices — whether UHC inflated Medicare Advantage risk scores to extract billions in excess payments from federal taxpayers.
3. Criminal Medicare Fraud Investigation — May 2025
The Wall Street Journal reported UHG is under criminal investigation for possible Medicare fraud — the highest level of federal enforcement scrutiny, reserved for conduct the DOJ believes may constitute a crime.
The Congressional Response — AOC & Doggett to AG Bondi
On June 9, 2025 — the same month the criminal investigation was reported — Representatives Alexandria Ocasio-Cortez and Lloyd Doggett wrote directly to AG Pam Bondi urging the DOJ to expand its investigations to include the Guardian's nursing home findings. The letter demanded a briefing by July 14, 2025 and was cc'd to the HHS Inspector General. Doggett had already written to UHC CEO Hemsley on behalf of Dr. Elizabeth Potter in January 2026. Read the full letter (PDF) →
The DOJ is actively investigating UnitedHealth Group's Medicare Advantage billing practices, with investigators interviewing former employees involved in coding patient diagnoses — indicating a deepening phase of the probe into how the company inflates risk scores for payment.
- The investigation centers on "upcoding" — whether UnitedHealth used in-home health assessments to add diagnoses and improperly inflate risk adjustment payments from Medicare by potentially billions of dollars.
- Previous reporting suggested these practices could have led to $8.7 billion in extra Medicare payments in 2021 alone — taken from American taxpayers.
Read the Fierce Healthcare Article → Read the Wall Street Journal Article →
Too Big to Fail? Lawmakers Are Eyeing a Breakup of UnitedHealth Group
Driven by UnitedHealth Group's immense size and alleged anticompetitive vertical integration, U.S. lawmakers and regulators are seriously considering antitrust action — including the possibility of breaking up the healthcare giant.
- UHG's Optum employs or is affiliated with roughly 90,000 physicians — making it the largest employer of doctors in the U.S. Optum also controls ~15% of the outpatient surgery market.
- Concerns focus on UHG steering patients to its own providers and pharmacies, using patient data anti-competitively, and using acquisitions like Change Healthcare to further consolidate power.
UnitedHealth Medicare Advantage Fraud Investigation
The DOJ is conducting a civil fraud investigation into UHG's Medicare Advantage billing practices — specifically whether the company improperly inflated payments by diagnosing patients with conditions that were not medically relevant or accurate ("upcoding").
- An HHS OIG report found UHG received over $3.7 billion from Medicare in 2023 for diagnoses made during in-home assessments and chart reviews that lacked follow-up treatment.
- Senator Chuck Grassley cited reports that UHG's inappropriate diagnoses resulted in $8.7 billion in extra Medicare payments in 2021 alone.
Following Ryan's Call, DOJ Launches Investigation into UnitedHealth
The DOJ launched an investigation into UnitedHealth Group's Medicare billing practices following calls from lawmakers including Rep. Pat Ryan — coming shortly after UnitedHealth announced staff reductions despite allegations of defrauding taxpayers of billions.
- Rep. Ryan called the alleged upcoding behavior "deeply disturbing" and potentially harmful to both taxpayers and seniors needing care.
- The investigation targets in-home Health Risk Assessments (HRAs) as the primary vehicle for inflating Medicare risk adjustment payments.
Justice Department Sues to Block UnitedHealth Group's Acquisition of Amedisys
The DOJ and Attorneys General of Minnesota and New York filed a civil antitrust lawsuit to block UHG's proposed acquisition of Amedisys, alleging the merger would substantially lessen competition in the home health services market across numerous states.
- The DOJ argued that allowing UHG's Optum — which already owns LHC Group — to also acquire Amedisys would harm vulnerable patients, including seniors and individuals with disabilities who rely on home health care.
- Alleged harms: higher prices, lower quality of care, reduced access, less innovation, and depressed wages for home health workers.
Trump DOJ Gives Monopolist UnitedHealth a Green Light to Swallow Yet Another Competitor
The Trump administration's DOJ settled the Biden-era antitrust lawsuit that was originally filed to block UnitedHealth Group's $3.3 billion acquisition of Amedisys — drawing immediate criticism that the deal represents political favoritism over patient protection.
- Critics including Senator Elizabeth Warren called the settlement "half-baked," alleging it allows UnitedHealth to divest required locations to "similarly conflicted buyers," including a private equity firm.
- The Biden-era DOJ had warned the merger would let UnitedHealth "further extend its grip" on home health care, "threatening seniors, their families, and nurses."
- A recent analysis cited in the article states that UnitedHealth Group currently has approximately 2,700 subsidiaries.
Change Healthcare Settlement: Proposed Final Judgment and Competitive Impact Statement
This document outlines the DOJ's settlement with UHG regarding the acquisition of Change Healthcare. To resolve antitrust concerns, UHG agreed to divest Change Healthcare's claims editing business (ClaimsXten) to private equity firm TPG Capital — allowing the main acquisition to proceed.
- The original DOJ lawsuit aimed to block the acquisition entirely because it alleged UHG (a major insurer) acquiring Change Healthcare (a critical data source for rival insurers) would give UHG unfair access to competitors' sensitive information.
- Legal basis: alleged violation of Section 7 of the Clayton Act.
NY Attorney General Takes Action to Protect Access to Health Services in Western New York
New York Attorney General Letitia James filed a lawsuit seeking a court order to prevent UnitedHealthcare from terminating contracts with Catholic Health System in Western New York, arguing the move would significantly harm healthcare access for thousands of New Yorkers.
- The termination would disproportionately affect seniors on Medicare Advantage and low-income individuals, removing in-network access to Mercy Hospital of Buffalo, Kenmore Mercy Hospital, and Sisters of Charity Hospital.
- AG James alleged UHC's action violates its obligations to maintain adequate provider networks and constitutes "irresponsible corporate behavior that prioritizes profits over patient well-being."
Whistleblower Accounts & Patient Stories
🔍 Investigation Cluster: Nursing Home Kickback Allegations
Revealed: UnitedHealth Secretly Paid Nursing Homes to Reduce Hospital Transfers
A Guardian investigation based on thousands of confidential records and over 20 whistleblower interviews found that UnitedHealth Group secretly paid bonuses to nursing homes for reducing hospital transfers — embedding its own medical teams in approximately 2,000 facilities to push cost-cutting tactics for Medicare Advantage patients.
- The program allegedly directly harmed residents — in several cases, residents showing clear stroke symptoms were not transferred to a hospital after UnitedHealth staff intervened, leading to permanent brain damage and paralysis.
- Whistleblowers alleged staff were pressured to meet financial targets such as a low "admissions per thousand" (APK) rate, which took priority over patient outcomes.
- Following publication, UnitedHealth's shares dropped more than 6%. UnitedHealth filed a defamation lawsuit against The Guardian.
UnitedHealth Shares Fall Again Following Reports on Kickbacks to Nursing Homes
UnitedHealth Group's shares tumbled a second time after follow-up reporting on the alleged nursing home bonus program. Whistleblowers allege the program led to delayed or denied medically necessary hospital care for vulnerable seniors — including at least one resident who suffered brain damage after a delayed stroke transfer.
- Shares fell by as much as 8%, closing down 5.78% at $302.98.
- HSBC analysts downgraded UHG's stock from "Hold" to "Reduce," cutting the price target to a "street-low" of $270.
UnitedHealth's Response — Statement and Context
UnitedHealth Group issued a formal response to The Guardian's investigation on May 21, 2025. It is reproduced here in the interest of fairness and accuracy. The response is the evidence — not because it is dishonest, but because of what it addresses and what it doesn't.
UHC's Response — Key Claims
On bonus payments: "There is nothing secret about our programs... payments are structured through contracts that incentivize high-quality outcomes."
Note: Does not deny the payments existed. Reframes them as value-based care incentives. The whistleblower allegation is about what behaviors the bonuses incentivized — specifically, reduced hospitalizations regardless of patient condition.
On hospitalization pressure: "The suggestion that UnitedHealthcare or Optum employees prevented transfers to the hospital is verifiably false."
Note: UHC also cited the DOJ's prior decision not to pursue two whistleblower cases. The AOC/Doggett letter to AG Bondi, filed the same month, urged the DOJ to reopen inquiry based on new Guardian reporting.
On DNR pressure: "At no time have we encouraged or pushed a member to sign a DNR directive... Our Serious Illness Conversation training comes from gold-standard materials developed by Harvard School of Public Health."
Note: Does not address the specific whistleblower allegation that staff were instructed to persuade patients with clearly expressed wishes for full treatment to change their code status. Program description ≠ factual denial of specific conduct.
The Reframing Pattern
UHC's response consistently substitutes program descriptions for factual denials of specific conduct. "We have a value-based care program" is not the same as "we did not pay nursing homes to reduce hospital transfers regardless of patient condition." The gap between what was alleged and what the response addresses is itself evidence of the kind that S.3829's Section 7 investigative authority was designed to close — because the evidence of what actually happened is inside UHC's records.
Natalie Collins — "We Were Taught So Many Different Ways to Deny"
Natalie Collins worked in UnitedHealthcare's medical claims department. She went through 2-3 months of training, was approved to pay claims up to a certain dollar amount, and spent her days finding ways to get patients off the phone as fast as possible. She carried the story for 11-12 years before posting a TikTok after the Luigi Mangione case brought national attention to health insurance denial. She woke up the next morning to it going viral. She appeared on NewsNation Prime.
"We were taught so many different ways to deny."
"There wasn't enough money in certain files in certain companies to pay medical claims, so we would have to just get the client off the phone as fast as we could. And then if they weren't liking what we were saying from the script, we would call a supervisor and they would stand behind us."
"Did you feel that you were truly there to help connect people with these services? Not at all. Simple answer. Not at all. It was just a building."
The Hospice Widow — The Straw That Broke
A widowed woman called to say her husband had died of pancreatic cancer, leaving her with five boys, and to file a hospice claim. Collins was told "every which way to deny this woman to get her off our phone line." She was not permitted to submit the claim — it would just sit in the queue and go to someone else 30 or 60 days later. Collins went in herself, found the claim, and paid it — hitting her daily dollar limit for that one payment. She walked to her supervisor's desk, handed in her badge, and left. That was her last day.
The Scienter Significance
Collins documents the training layer of scienter — not an algorithm, not a policy document, but what was spoken in the claims department. "Taught so many different ways to deny" is the internal institutional knowledge that the fraud argument requires. She is the inside voice. The supervisors instructing her to find denials are the chain of knowledge the legal standard needs. Her account is not a complaint about a bad day. It is a description of the system as designed.
U.S. lawmakers from both parties are now "raising concerns and seeking investigations" into UnitedHealth's nursing home programs. Senator Ron Wyden launched a "full investigation," and Representatives Alexandria Ocasio-Cortez and Lloyd Doggett urged the DOJ to "thoroughly review new revelations" of "potential waste, fraud, and abuse at UnitedHealth."
- Sworn declarations allege UnitedHealth "actively avoided medically necessary hospitalizations... in serious life-threatening situations" and drove patients toward signing Do Not Resuscitate (DNR) and Do Not Hospitalize orders to avoid hospital costs.
- A third pending lawsuit alleges UHC "paid kickbacks to nursing homes" for illegal referrals and used "improper marketing tactics" to enroll vulnerable residents, sometimes violating HIPAA.
UnitedHealth Group Resists Shareholder Proposal on Delayed and Denied Care
UnitedHealth Group asked the SEC to block a non-binding shareholder proposal that would require the company to report on the broader economic and public health costs of its practices that delay or deny patient care. The proposal was filed by the Interfaith Center on Corporate Responsibility (ICCR), representing institutional investors.
- Shareholders argued UHG — the 19th-largest company in the world — has such market power that its denial practices could harm the overall US economy by keeping workers sick, indebted, and less productive. More than 5% of US GDP flows through UHG each day.
- UHG argued terms like "public health-related costs" were too vague. Shareholders later withdrew the proposal after UHG challenged it twice, but stated they will continue dialogue with the company.
UnitedHealth Under Scrutiny for Nursing Home Practices — And a Family's Story
UnitedHealth Group faces scrutiny over accusations that it provided financial bonuses to nursing homes to incentivize fewer hospital transfers — with families and whistleblowers alleging residents' medical issues were concealed, delayed, or denied to protect profit margins.
- Nurse practitioner whistleblowers allege the bonus system led to "delays and denials of medically necessary care." Senators Ron Wyden and Elizabeth Warren have launched investigations.
- Vincent Cinque, whose mother and grandmother are both in nursing homes, says their treatment has been "halted for some time" and their experiences align directly with the alleged practices. "It feels like the system is designed to break us, to crack us, and to make us give up. But I don't want to give up on my Mom."
Read the NewsNationNow Article → Watch the NewsNationNow YouTube Coverage →
🤖 AI as Weapon vs. Tool — Same Technology, Provably Different Intent
What they meant for evil can be a force for good. The difference is not the technology — it's the intention. And the intention is provable in the programming.
AI Used By Insurance to Deny
90%
Error Rate
UnitedHealth's nH Predict algorithm — 9 out of 10 denials reversed on appeal. Deployed anyway because only 0.2% of patients fight back.
Estate of Lokken v. UnitedHealth Group → Georgetown Litigation Tracker
AI Used Advocating for Patients
72–96%
Accuracy Range
AI virtual assistant correct answer rate across multiple countries and medical licensing exams — consistently outperforming physician averages of 46–62%. (PMC, 2025)
Read the Peer-Reviewed Study → PMC / NIH
The same underlying technology. Even at its lowest, a 168-point accuracy gap over nH Predict. The only variable is who it was programmed to serve.
AI as a Weapon: UnitedHealth's nH Predict
UnitedHealth Group's nH Predict algorithm — built on 6 million patient records and acquired via the $2.5 billion NaviHealth purchase in 2020 — was deployed across Medicare Advantage plans to automate post-acute care denials. A class action lawsuit (Estate of Lokken v. UnitedHealth Group) alleges the company knowingly used a tool it knew had a 90% error rate, meaning 9 out of 10 denials were reversed on appeal.
- UnitedHealthcare's denial rate for skilled nursing facility admissions rose from 1.4% in 2019 to 12.6% in 2022 — a ninefold increase coinciding directly with nH Predict's deployment. (Senate PSI Report, October 2024)
- The lawsuit alleges UHC "continue[s] to systemically deny claims using their flawed AI model" because only 0.2% of policyholders appeal — meaning the company allegedly calculated that wrongful denial was financially profitable precisely because patients wouldn't fight back.
- Cigna faces parallel allegations over its PxDx system, which a ProPublica investigation found allowed a single medical director to reject 60,000 claims in one month — without reviewing individual patient files.
- On February 13, 2025, a federal judge allowed breach of contract claims to proceed — one of the first times a court has permitted a class action challenging AI-driven health insurance denials to advance toward trial.
The Core Allegation
"Defendants illegally deploy[ed] artificial intelligence in place of real medical professionals to wrongfully deny elderly patients care owed to them under Medicare Advantage Plans by overriding their treating physicians' determinations as to medically necessary care based on an AI model that Defendants know has a 90% error rate."
— Estate of Lokken v. UnitedHealth Group, Class Action Complaint
Case Update — 2026
Federal judge allows breach of contract and good faith claims to proceed. First class action challenging AI-driven health insurance denials to advance toward trial.
Federal magistrate orders broad discovery — UHC must produce internal policies, nH Predict analyses, naviHealth acquisition documents, government investigation records, and employee training materials dating back to January 2017. Court grants 6 of 7 plaintiff requests.
Court-ordered deadline for UHC to produce tens of thousands of documents. UHC had previously sought to narrow the scope of discovery — denied. Documents status pending further reporting.
What's inside that document production could determine whether the 90% error rate was known before deployment — which is the scienter question the entire case turns on.
The Intent Argument — Stated in the Numbers
90%
nH Predict error rate
Alleged. Deployed anyway.
Source: Estate of Lokken v. UHG class action complaint
85.2%
UHC IRE overturn rate (2023)
The baseline nH Predict replaced — external independent reviewers overturning UHC's own denials 85.2% of the time.
Source: CMS external appeal data · AbilityForge IRE tracking
79.1%
UHC IRE overturn rate (2024)
Still 79.1% of denials that reached independent review couldn't be defended.
Source: CMS external appeal data · AbilityForge IRE tracking
The question the numbers force:
When an independent external reviewer — not a patient advocate, not an attorney, not a political actor, but a third-party IRE physician — overturns UHC's denials 85.2% of the time, that is not an error rate. That is a documented baseline of how often UHC's denials cannot withstand independent clinical scrutiny.
Then they built nH Predict — an algorithm that is wrong 90% of the time. You cannot accidentally build something worse than your own baseline. Every parameter of nH Predict was a decision made by a person who already knew what the IRE overturn rate was. The machine did not malfunction. It performed as designed.
A Different Number From KFF 2023 — The Appeal Problem
The 85.2% IRE overturn rate measures what happens when denials reach independent review. KFF's 2023 ACA Marketplace analysis measures something equally damning: how rarely patients get there. Of 86 million in-network denied claims in 2023, patients appealed fewer than 1% — 376,508 total. Of those internal appeals, insurers upheld 56%. Only 3% of upheld internal appeals were taken to external review. And 40% of consumers didn't even know they had the right to an external appeal.
<1%
of denied claims appealed
56%
of internal appeals upheld by insurer
33%
UHC's ACA Marketplace denial rate — 2nd highest of major insurers
Source: KFF, "Claims Denials and Appeals in ACA Marketplace Plans in 2023," January 27, 2025 (updated March 24, 2026). CMS Transparency in Coverage data, updated September 30, 2025. UHC denial rate from Table 1: 4,670,649 denied of 14,022,287 received = 33%.
The architecture is now clear: UHC denies 33% of in-network claims. Fewer than 1% are appealed. Of those that reach an IRE, 85.2% are overturned. The business model depends entirely on patients not fighting back — and the data shows most don't.
The AMA saw it coming — and said so:
61% of physicians surveyed in December 2024 reported concern that AI would increase denial rates. They were not predicting a future risk. nH Predict had already been running for years. The physicians were recognizing, from the patient outcomes in their own practices, something that was already in motion.
Source: 2024 AMA Prior Authorization Physician Survey, n=1,000 practicing physicians, published February 2025.
The case is made. The remedy exists.
S.3829, S.3822, and the Clinical Integrity Amendment close the gaps documented here.