One analyst sees a natural connection between Wal-Mart and Humana as a reason the retail giant could acquire the health insurer. Humana steers its members to Wal-Mart pharmacies for deals on prescription co-pays.
"Humana and Wal-Mart have been in a very tight relationship for six, seven years," Dr. Ana Gupte, a senior health-care services analyst at Leerink Partners, told "Squawk Box" on Friday.
She sees a potential deal for Humana going for more than $46 billion, saying a buyer would have to pay a "25 percent to 30 percent premium now." The company has a market value of over $37 billion, according to FactSet.
CVS is closing in on a $66 billion deal for Aetna, which would be the largest ever in health insurance history, according to an analysis of Thomson Reuters data.
The deal could improve CVS' competitiveness to offer a fully integrated health insurance and drug service.