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The Guardian - US
The Guardian - US
World
Guardian staff and agencies

UnitedHealth Group shares plunge after report of Medicare fraud inquiry

a sign on a building reads 'UnitedHealthcare'
United Healthcare corporate headquarters in Minnesota last year. Photograph: Stephen Maturen/Getty Images

Shares in the UnitedHealth Group tumbled after it was reported that the largest health insurer in the US is under investigation over possible criminal Medicare fraud.

The US Department of Justice has been investigating the health insurance giant since last summer, the Wall Street Journal reported, citing unnamed people familiar with the matter.

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