Many people don't fully understand their health insurance benefits, according to a new survey from the National Association of Insurance Commissioners (NAIC). And this lack of understanding often leads people to pay more out of pocket for health care than they have to.

For example, 61% of people say they understand their right to appeal a health insurance claim denial, according to NAIC. That means everyone else could get a denial and think they have to live with it. In addition, only 19% of people know that they can go to an out-of-network doctor and still get some health insurance coverage for the visit.

With open enrollment period in full swing at many workplaces, it's vital to understand the benefits you're buying. Your choices today affect your health insurance happiness for the next year.