UnitedHealth Group Under DOJ Criminal Investigation: Market Impact, Medicare Scrutiny, and Industry Fallout

Executive Summary
UnitedHealth Group, the largest health insurer in the United States, is facing a criminal investigation by the Department of Justice (DOJ) over possible Medicare fraud linked to its Medicare Advantage business. The news, first reported by The Wall Street Journal and confirmed by multiple financial outlets, triggered a steep decline in UnitedHealth’s stock price and sent shockwaves through the healthcare sector, raising concerns about regulatory scrutiny, oversight of Medicare Advantage, and the broader stability of the U.S. health insurance market. This report examines the origins and scope of the DOJ investigation, UnitedHealth’s response, the market reaction, the context of Medicare Advantage oversight, and the potential implications for the company, the industry, and federal healthcare policy.