What's Behind CVS's $12.7 Billion Takeover of Omnicare

NEW YORK (The Street) -- You know CVS (CVS): It's the place you go to buy everything from cold medicine to eye drops and hand sanitizer. But the drugstore giant's purchase of Omnicare (OCR) on Thursday might have left you wondering exactly what a "pharmacy services provider" is, and why CVS would pay $12.7 billion for one.

The answer is simple: "CVS is a retail pharmacy where you can walk into the store," said Charles Rhyee, an analyst with Cowen in New York. "Omnicare is a specialized pharmacy that serves nursing homes and assisted living facilities."

The takeover is the latest this year involving pharmacy services companies, businesses related to prescription drugs that don't actually manufacture or sell them in a traditional bricks-and-mortar pharmacy. Two of the deals involved so-called pharmacy benefit managers, a bureaucratic name for a business most Americans use regularly.

Pharmacy benefit managers are the companies that administer the prescription-drug portions of health plans, according to the American Pharmacists Association. They develop the formulary that decides which medicines are covered and which aren't -- whether your plan covers the antidepressant Prozac, but not Paxil, for instance.

Pharmacy benefit managers also negotiate prices with drug manufacturers and process prescription-drug claims. If you pay out of pocket, they handle your reimbursement check. If you have a $10 co-pay at a pharmacy, they pay the pharmacy the difference between that and the amount your plan covers.

CVS moved into pharmacy benefit management in 2006 when it agreed to buy Caremark. Today, that business accounts for more than half of the company's $139.4 billion in annual sales. 

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