There has been a considerable rise in health insurance companies in the world. In the general sense, health insurance refers to insurance against loss occurring due to ill health. Health insurance benefits are administered by agencies like government, private business or not-for-profit organizations. Health insurance, like any other form of insurance, is a written agreement between two parties, the insurer and the insured. The insurer is a company which is approved by an appropriate authority and the insured is the person who seeks the insurance. Health insurance covers medical expenses if there is a case of hospitalization over 24 hours inclusive of surgery, nursing care, diagnostic tests etc. Here are ten of the world’s best health insurance companies.