Aetna (NYSE:AET) is one of the nation's biggest health-care insurers, serving nearly 44 million Americans across its various health-care products.

Big insurers such as Aetna, UnitedHealth Group (NYSE:UNH), and WellPoint (NYSE:ANTM) offer investors predictable dividend-friendly revenue regardless of the economy's whims and whispers. But investors are correct to wonder if Aetna's dividend can be sustained in light of Obamacare regulation and soaring medical costs.

In the following slideshow, you'll see whether the Fool's Todd Campbell thinks Aetna's dividend is safe, and you'll gain some insight into how Aetna's dividend payout matches up with industry peers UnitedHealth and WellPoint.