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 cannot 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 health insurance, many of your costs are covered by a third-party payer, not by you. A third-party payer can be an insurance company or, in some cases, it can be your employer.

Many people in the United States are enrolled in some sort of managed care health insurance plan. This is an organized way of both providing services and paying for them. Different types of managed care plans work differently and include preferred provider organizations (PPOs), health maintenance organizations (HMOs), point-of-service (POS) plans and fee-for-service plans.

Individuals enrolled in health care plans pay a monthly or quarterly fee as insurance for the time when they will need medical attention. At the time when a service is provided, the health insurance organization pays part or all of the fee, minimizing the amount you have to pay at the time you receive the service.