Edelman has picked up a corporate communications pact with CVS Caremark, following an RFP process.

The retail pharmacy services, benefits manager and healthcare giant, which had 2011 revenue of more than $107 billion, also works with Weber Shandwick, TBC and Abernathy MacGregor Group. It is the largest company operating solely in the U.S.

CVS CEO Larry Merlo said in June that it plans to expand its in-store medical services clinics in the next few years from about 600 to more than 1,000 as he sees pharmacies helping to control U.S. healthcare costs.

Carolyn Castel is VP of corporate communications based in Woonsocket, R.I. for CVS Caremark, which runs 7,300 retail pharmacies, in addition to health clinics, online/mail order operations and pharmacy benefit management.