The U.S. Justice Department has filed a lawsuit to block UnitedHealth Group's $3.3 billion merger with Amedisys, citing concerns it would reduce competition and hinder access to home health and hospice services. The complaint, supported by four states' attorneys general, argues the acquisition could lead to higher prices and less choice for patients. UnitedHealth contends the merger would be pro-competitive. This follows previous acquisitions by UnitedHealth that have drawn scrutiny for potential monopolistic practices, raising questions about affordability and quality of care in a critical health service area.