California has ousted Blue Shield from the state's high-risk medical insurance pool because its premiums were too high. The pool, known as the Major Risk Medical Insurance Program, or MRMIP, insures more than 6,700 Californians who have been shut out of the private health insurance market because of pre-existing conditions. Through MRMIP, such people are able to buy coverage from private insurers at premiums that are supposed to be 25% higher than the market rate for a comparable policy. The state reimburses the insurers for any losses they incur, according to the Los Angeles Times.