The U.S. Department of Justice has intensified its investigation into UnitedHealth Group’s Medicare billing practices, according to reports from reliable sources.

Justice Department investigators are questioning former employees of UnitedHealth Group about the company’s use of doctors and nurses to gather diagnoses that may have increased its Medicare payments. This development follows earlier reports of a criminal probe into potential Medicare fraud by the healthcare conglomerate.

The significance of this investigation becomes clear when we consider the broader implications for the healthcare industry and the integrity of the Medicare system. Both the Federal Bureau of Investigation and the Department of Health and Human Services’ Office of Inspector General are reported to be involved in some of the interviews.

UnitedHealth’s stock has reacted to this news, with shares reportedly falling 1.1% in premarket trading. The evidence suggests that investors are closely watching the outcome of this investigation.

As of now, neither UnitedHealth nor the Department of Justice has responded to requests for comment on these developments. This raises important questions about the potential impact on the company and the healthcare sector at large.