Anthem Blue Cross, California's largest for-profit health insurer, is moving to dramatically raise rates for customers with individual policies, the Los Angeles Times reports. Anthem is telling many of its approximately 800,000 customers who buy individual coverage that its prices will go up March 1 and may be adjusted "more frequently" than its typical yearly increases. The insurer declined to say how high it is increasing rates, but brokers who sell these policies say they are fielding numerous calls from customers incensed over premium increases of 30% to 39%, reports the Times.