Health insurance provide 2 facilities – cashless and reimbursements. In case of cashless you will have to notify the hospital where you are undergoing treatment. Here it is mandatory to get treated from the network hospital of the insurance provider. For proof purpose you can either show the documents or the E-card that would be provided to you. After having a look at the same the hospital will process the claims accordingly. The hospital will forward the bills with the insurance company. The bills are then thoroughly checked and the settlement of payment is done.
In case of reimbursement, you pay your bills initially and apply for reimbursement later to get the amount back. Here it is not mandatory to get treated from a network hospital.