Anthem Care Comparison (available through the MyAnthem homepage for Anthem clients) provides cost and quality data you need to choose the right hospitals and medical care providers. Though, at the time of this writing, Care Comparison is only available in limited markets, including Central Indiana -- an apparent benefit of Anthem being headquartered in Indianapolis.
You can also see the number of times a service is annually performed by a provider. In addition, you can also access sophisticated quality scores for hospitals.
Perhaps the best way to understand how Anthem Care Comparison works is by viewing Anthem's Care Comparison Demo (flash video).