A central plank of the $67.5 billion merger of CVS and Aetna is transforming CVS's stores into health hubs where consumers can get care, pick up their drugs, buy some milk, and stay out of the hospital.
A deal between the two would create a health-services giant and a bigger competitor for UnitedHealth Group Inc., which is the largest U.S. health insurer and has its own own clinics and a pharmacy-benefits unit.