In which event(s) does availing cashless facility not require a pre-authorisation from the insurer/TPA?

A third-party administrator (TPA) is an organization that processes insurance claims or certain aspects of employee benefit plans for a separate entity. Reimbursement of the hospitalization expenses can be claimed where cashless hospitalization facility is not availed or treatment is availed in a non-network hospital. In this case, one will have to settle the hospital bill, collect all original hospitalisation documents and submit the documents to TPA's office for their scrutinizing the same in terms of the policy and check the admissibility or otherwise of the claim/expenses.