Yesterday, U.S. Department of Health and Human Services Secretary Kathleen Sebelius called for Anthem Blue Cross to publicly justify raising premiums for its California customers by as much as 39 percent. She also wants the company to disclose how much of premiums are spent on actual health care v. administrative overhead.

The parent company of Anthem Blue Cross, WellPoint Incorporated, earned $2.7 billion in the last quarter of 2009.

Here's the letter...