The U.S. Department of Justice, alongside three states, has filed a lawsuit to block UnitedHealth Group's $3.3 billion acquisition of Amedisys Inc., citing concerns over reduced competition in the home health services sector. The lawsuit emphasizes potential harm to patients, insurers, and healthcare providers if the merger proceeds, reflecting the government's commitment to maintaining a competitive healthcare market. This legal challenge highlights ongoing scrutiny of industry consolidation and its implications for consumer costs and choices.