Anthem Blue Cross, the biggest customer of Express Scripts, has changed their supplier. What is interesting is that Express Scripts offered Anthem $1 billion in price concessions. Does this mean they were overcharging by at least $1 billion in the first place?  And that Anthem, which merely passes this on to its customers, approved of this?  Why did it take so long for Anthem to make a change to a less expensive provider?  And why is there such a gap between the new provider and Express Scripts?  Are we dealing with quality issues? So many questions, and so much money…