Blue Shield of California partners with Amazon, Mark Cuban's Cost Plus Drugs to overhaul pharmacy benefits system

Blue Shield of California is dropping CVS Caremark as its main pharmacy benefit manager in favor of Amazon Pharmacy and Mark Cuban's Cost Plus Drug Company.
The insurer aims to reduce costs through transparent pricing models offered by the new partners.
Blue Shield expects to save up to $500 million annually on drug costs once fully implemented.
The shift caused CVS Health's stock to plunge nearly 10% on the news.
Amazon and Cuban's pharmacy aim to disrupt the traditional model of drug pricing and distribution.