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.

UnitedHealth shares a quarterly report for the first time since the death of insurance unit leader Brian Thompson. A look at the estimates and key items to watch.

But high medical costs contributed to results that disappointed Wall Street, and the company’s stock fell on the news that it had made less than analysts expected.