Aetna shares took a hit Tuesday after the health-insurance giant said it expects medical costs to rise to the high end of its forecasts.
However, CEO Mark Bertolini told CNBC that while people may be worried that health-care costs will increase now that the economy is improving and will become an industry trend, he's not.
"We look at this every month, and we've looked at the overall trends in the marketplace and trends are behaving," Bertolini said in an interview with "Closing Bell."
The Affordable Care Act, also known as Obamacare, was an "action-forcing event" that led to hospitals and providers doing things differently and more effectively, he added. Consumers are also paying more out of pocket and are therefore more cautious about how they spend their money.
"If any kind of health-care inflation returns, it's going to be related to a slow growth in the economy," he said. "We have to watch it develop. Given that its moving slowly today, I think we have time to get in front of it should it jump up."