Revenue grew to over $400 billion, but still missed growth targets.

The CEO of UnitedHealth Group defended the company's role in the U.S. health care system days after a report said the company made huge profits by significantly marking up the cost of lifesaving drugs.

After reporting weaker than expected results for the company’s insurance division, UnitedHealth CEO’s said his company was not to blame for the high cost of healthcare in the U.S.