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Senate Democrats on Thursday said Medicare should take more urgent and aggressive action to prevent health insurance companies from using artificial intelligence to unlawfully deny medical services.

The Biden administration’s latest efforts to increase transparency into AI tools don’t go far enough to protect patients, the lawmakers said at a Senate Finance Committee hearing.

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Sen. Elizabeth Warren (D-Mass.), citing a STAT investigation, took particularly sharp aim at the use of algorithms to deny care within Medicare Advantage. STAT’s stories had found repeated denials of desperately ill patients by the nation’s largest insurers.

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