Today, health care costs are high, and getting higher. Who will pay your bills if you have a serious accident or a major illness? You buy health insurance for the same reason you buy other kinds of insurance, to protect yourself financially. With health insurance, you protect yourself and your family in case you need medical care that could be very expensive. You can't predict what your medical bills will be. In a good year, your costs may be low. But if you become ill, your bills could be very high. If you have insurance, a third-party payer, not by you, covers many of your costs.