Health Insurance:

Health insurance is a form of group insurance, where individuals pay premiums or taxes in order to help protect themselves from high or unexpected healthcare expenses. Health insurance works by estimating the overall "risk" of healthcare expenses and developing a routine finance structure (such as a monthly premium, or annual tax) that will ensure that money is available to pay for the healthcare benefits specified in the insurance agreement. The healthcare benefit is administered by a central organization, which is most often either a government agency, or a private or not-for-profit entity operating a health plan.