Walmart is in preliminary talks to buy health insurance company Humana, according to The Wall Street Journal. The report didn't disclose terms for the deal, although Humana's market value is $37 billion.

CVS will buy insurance giant Aetna in a roughly $69 billion deal that will help the drugstore chain provide more health care and keep a key client, according to a person with knowledge of the matter. 

Alexa might want to be your drugstore, too: Amazon (AMZN) reportedly has obtained pharmacy licenses in a handful of states, hinting at possible plans to disrupt both the drugstore business and the larger healthcare industry. 

Premiums will go up sharply next year under President Barack Obama’s health care law, and many consumers will be down to just one insurer, the administration confirmed Monday.

In the last few weeks, Aetna and United Healthcare have decided not to participate in the national exchange for next year. Now, Blue Cross Blue Shield, the state's largest and now only insurance provider in the program, is asking for a large rate increase.