AI incident #608 ·

UnitedHealth Accused of Deploying Allegedly Flawed AI to Deny Medical Coverage

Open on the AI Incident Database 21 news reports Synced from the AIID API · record last edited 3 Sep 2026

What happened

UnitedHealthcare allegedly used a faulty AI algorithm with a 90% error rate to override doctors' recommendations and deny health coverage. This AI, developed by NaviHealth, reportedly led to premature discharge from care facilities and substantial out-of-pocket expenses for patients, according to a lawsuit filed in the District Court for Minnesota.

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News reports (21)

Coverage catalogued by the AI Incident Database. Titles link to the original publisher; the text is not reproduced here.

  1. Lawsuit: Health Insurer's AI Tool 'Illegally' Denies Claims
    bankinfosecurity.com · Marianne Kolbasuk McGee · AIID #3369

Who was involved

Alleged deployer
UnitedHealthcare
On AIID: UnitedHealthcare
Alleged developer
NaviHealth
On AIID: NaviHealth
Alleged harmed party
Patients Medicare Advantage Plan Patients Healthcare Providers (Doctors and Therapists) Elderly patients
On AIID: Patients, Medicare Advantage Plan Patients, Healthcare Providers (Doctors and Therapists), Elderly patients

AI systems implicated

Enterprise AI systemsAI-enabled decision support systems

Classification (MIT AI Risk Repository taxonomy)

Causal entity
AI
Intent
Intentional
Timing
Post-deployment
Harm level
Sectors
Countries

Risk entries describing this failure mode

Entries from the MIT AI Risk Repository coded to subdomain 7.3.

  • Reliability issues

    "Relying on general-purpose AI products that fail to fulfil their intended function can lead to harm. For example, general- purpose AI systems can make up facts (‘hallucination’), generate erroneous computer code, or pro...

    International AI Safety Report 2025 (Bengio2025)

  • Type 2: Bigger than expected

    Harm can result from AI that was not expected to have a large impact at all, such as a lab leak, a surprisingly addictive open-source product, or an unexpected repurposing of a research prototype.

    TASRA: a Taxonomy and Analysis of Societal-Scale Risks from AI (Critch2023)

  • Type 3: Worse than expected

    AI intended to have a large societal impact can turn out harmful by mistake, such as a popular product that creates problems and partially solves them only for its users.

    TASRA: a Taxonomy and Analysis of Societal-Scale Risks from AI (Critch2023)

  • Ethics and Morality Issues

    LMs need to pay more attention to universally accepted societal values at the level of ethics and morality, including the judgement of right and wrong, and its relationship with social norms and laws.

    Towards Safer Generative Language Models: A Survey on Safety Risks, Evaluations, and Improvements (Deng2023)

  • Safe learning

    "AGIs should avoid making fatal mistakes during the learning phase. Subproblems include safe exploration and distributional shift (DeepMind, OpenAI), and continual learning (Berkeley)."

    AGI Safety Literature Review (Everitt2018 )

  • Malign belief distributions

    "Christiano (2016) argues that the universal distribution M (Hutter, 2005; Solomonoff, 1964a,b, 1978) is malign. The argument is somewhat intricate, and is based on the idea that a hypothesis about the world often includ...

    AGI Safety Literature Review (Everitt2018 )

  • Meta-cognition

    "Agents that reason about their own computational resources and logically uncertain events can encounter strange paradoxes due to Godelian limitations (Fallenstein and Soares, 2015; Soares and Fallenstein, 2014, 2017) an...

    AGI Safety Literature Review (Everitt2018 )

  • Misaligned consequentialist reasoning

    "As we think about even more intelligent and advanced AI assistants, perhaps outperforming humans on many cognitive tasks, the question of how humans can successfully control such an assistant looms large. To achieve the...

    The Ethics of Advanced AI Assistants (Gabriel2024)

Linked by AIID editors or by its text-similarity model.

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