Insurance companies, drugmakers, and suppliers were not going to stand by and watch as hospitals formed giant corporations without responding. So drug giant CVS—which, in addition to its omnipresent stores, ran the nation’s largest pharmacy benefit manager (PBM) operation, CVS Caremark—bought out insurance giant Aetna for $69 billion. Aetna had earlier acquired Prudential Healthcare. As a Columbus Dispatch investigation showed, CVS Caremark used its consolidated power against small pharmacies in much the same way ProMedica did against St. Luke’s. CVS, which ran the prescription operations for
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