UnitedHealth (UNH) Stock Falls on Report of DOJ Investigation Into Medicare Billing - Barron's
1. DOJ launches fraud probe into UNH's Medicare billing practices; investigation ongoing. 2. UNH stock fell 12% in premarket; investor confidence is shaken. 3. The probe targets diagnosis documentation triggering extra Medicare Advantage payments; scrutiny intensifies. 4. Recent DOJ antitrust action on Amedisys deal adds to UNH legal challenges; competitive risks persist.