Health insurance has become necessity to all with the increasing expenses of medical treatments. It has also become troublesome factor for middle-class people. In such case, health insurance provides all the benefits and helps you to manage financial emergency. Health insurance is essentially an agreement between the health insurance companies and peoples those who seek health insurance policy. The companies cover all the medical expenses of health insurance policyholders according to their medical insurance policy terms. The policy ensures that you get cashless treatment or expense reimbursement. In other words, a health insurance plan compensates the insured for medical and surgical expenses arising from any critical illness and injury. So you should choose the best health insurance companies which offer their medical insurance customers with cashless health insurance facility in all of their network hospitals in India. But sometimes claims on health insurance policies paid on repayment basis, especially when the policyholders benefit treatment in a hospital which is not included in the network of health insurance companies.