I did some
research on why CVS/Pharmacy is called such, and not just the CVS. Findings listed below, along with source
CVS/pharmacy used to be a subsidiary of Melville Corporation until Melville changed its name to CVS Corporation in 1996.The initials once stood for Consumer Value Stores, but CEO Tom Ryan has said he now considers it to stand for "Customer, Value, and Service."During the company's days as a regional chain in the Northeastern U.S., many of CVS's stores did not include pharmacies. These stores were simply called "CVS", while the ones with pharmacies were called "CVS/pharmacy." Additionally, in some jurisdictions, pharmacies are required to label themselves as such. Today, the company no longer builds new stores without pharmacies, and is gradually phasing out the old convenience store-type shops that remain in New England, New York, Washington, D.C., and shopping malls.
(http://www.cvscaremark.com/our-company/history) and of course Wikipedia.