The impact wouldn't just be limited to the insurance market. Each company also owns a firm that manages drug benefits. The combined company could create a pharmacy benefit manager (PBM) that controls a third of the market, making it as large as CVS's PBM, Caremark.
"As the set of names under each corporate masthead grows, there are fewer opportunities for unintegrated entities to provideâ¦care," noted an economist.
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