UnitedHealth Group is under federal investigation for its Medicare Advantage plans, which provide healthcare for people 65 and older. The company is cooperating with the investigation and has a history of responsible conduct. The government is looking into how the company documents diagnoses for extra payments. UnitedHealth Group has proactively reached out to the Department of Justice and launched its own initiative to review policies and practices. The investigation comes after the alleged shooting of UnitedHealthcare CEO Brian Thompson in December 2024.