The U.S. Department of Justice (DOJ) is conducting a criminal investigation into UnitedHealth Group, focusing on its prescription management services through its pharmacy benefit manager Optum Rx and the reimbursement practices for its own doctors. This probe extends beyond previously known inquiries into Medicare billing practices. No charges have been filed, and UnitedHealth has expressed confidence in its compliance. Additionally, UnitedHealth lent more than $9 billion to healthcare providers following a ransomware attack that disrupted its Change Healthcare unit. U.S. Senators Ron Wyden and Elizabeth Warren have raised concerns about alleged abusive tactics by UnitedHealth in recouping these loans from doctors, prompting them to request further information from the company. The ongoing investigation and related scrutiny highlight increased regulatory attention on UnitedHealth's business operations and financial practices.