Cigna PXDX AI Denial Class Action
G.T. v. Cigna / IQVIA — AI Healthcare Coverage Denial Class Action (D. Conn.)
E.D. Cal. · Kisting-Leung v. Cigna Corp., No. 2:23-cv-01477 (E.D. Cal.)
- Status
- Blocked / in litigation
- Took effect
- July 24, 2023
- Applies to
- Cigna Corp. and similarly situated insurers using algorithmic claims-denial systems
Patients sued Cigna in 2023 alleging its 'PxDx' algorithm reviewed and denied roughly 300,000 claims in two months — averaging 1.2 seconds per denial — without genuine physician review, violating California and federal law. Triggered a wave of similar AI healthcare-denial suits against UnitedHealth (NaviHealth) and Humana.
Who is protected: Patients with health-insurance claims subject to automated coverage-denial algorithms
Legal detail
Kisting-Leung v. Cigna Corp., No. 2:23-cv-01477 (E.D. Cal., filed July 24, 2023; Judge Daniel J. Calabretta). Cal. Health & Safety Code § 1367 + ERISA + breach of contract + UCL claims tied to PxDx automated denials. Class certification briefing 2025–2026; parallel actions against UnitedHealthcare (NaviHealth) and Humana also active.
Key facts
| Jurisdiction | E.D. Cal. |
|---|---|
| Level | Federal |
| Citation | Kisting-Leung v. Cigna Corp., No. 2:23-cv-01477 (E.D. Cal.) |
| Topics | healthcare AI · automated decision-making · consumer protection |
| Court record | Kisting-Leung v. Cigna — CourtListener 2:23-cv-01477 |
Related healthcare AI rules elsewhere
- Missouri AI Therapy Chatbot Ban (SB 1019) · In effect
- PA v. Character.AI (Fake Psychiatrist Chatbot) · Blocked / in litigation
- RI Therapy Chatbot Ban (2026) · In effect
- RI AI Companion Self-Harm Safety (2026) · Enacted (not yet in effect)
- California AB 489 (AI healthcare chatbot misrepresentation ban) · In effect
- AZ HB 2175 (AI Insurance Denial — Physician Review) · In effect
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