Case tracker

AI & Big Tech Harm Case Tracker

A continuously updated, sourced record of lawsuits and regulatory actions over harm caused by AI systems, social media platforms, and Big Tech — chatbot failures, addictive design, child safety, biometric privacy, algorithmic denials, and more. Each case links to attorneys who handle that kind of matter.

If something like one of these happened to you, you don't have to navigate it alone — open a case and use it to find and contact attorneys who handle that exact kind of harm.

2 cases · AI benefit & claim denials

• AI benefit & claim denials

  Ongoing

  Filed Nov 14, 2023

  Estate of Lokken v. UnitedHealth Group, Inc.

  UnitedHealth / NaviHealth "nH Predict" AI algorithm · United States (Minnesota)

  The estates of deceased Medicare Advantage enrollees allege UnitedHealth used the nH Predict AI tool to deny medically necessary post-acute care, overriding clinicians’ judgment, while allegedly knowing the tool had a roughly 90% reversal rate on appeal. A federal magistrate ordered broad discovery into UnitedHealth’s AI claims processes in 2025 and the case is proceeding.

• AI benefit & claim denials

  Ongoing

  Filed Jul 24, 2023; class advanced Mar 2025

  Kisting-Leung v. Cigna Corporation

  Cigna "PxDx" automated claims-review algorithm · United States (California)

  Following a ProPublica investigation, plaintiffs filed a class action alleging Cigna's PxDx algorithm enabled mass denial of claims, with reviewing doctors allegedly spending an average of about 1.2 seconds per case, contrary to California law requiring thorough, fair review. In March 2025 the court allowed the class action over the AI-based algorithm to proceed.

This tracker is an informational summary of public legal matters compiled from the sources cited on each case page. It is not legal advice and is not a complete record of any case. Verify current status with primary sources before relying on it.