UnitedHealth Group (NYSE:UNH) is one of the nation's biggest health care insurers, serving nearly 87 million Americans across its various health care products. As a result, UnitedHealthcare is often included in dividend investor's portfolios.

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

In the following slideshow you'll see whether I think UnitedHealth's dividend is safe and gain insight into how UnitedHealth's dividend payout matches up with industry peers WellPoint and Aetna.