In the United States, a third-party administrator (TPA) is an organization that processes insurance claims or certain aspects of employee benefit plans for a separate entity.[1] It is also a term used to define organizations within the insurance industry which administer other services such as underwriting and customer service. This can be viewed as outsourcing the administration of the claims processing, since the TPA is performing a task traditionally handled by the company providing the insurance or the company itself. Often, in the case of insurance claims, a TPA handles the claims processing for an employer that self-insures its employees. Thus, the employer is acting as an insurance company and underwrites the risk. The risk of loss remains with the employer, and not with the TPA. An insurance company may also use a TPA to manage its claims processing, provider networks, utilization review, or membership functions. While some third-party administrators may operate as units of insurance companies, they are often independent.[citation needed]
Third-party administrators also handle many aspects of other employee benefit plans such as the processing of retirement plans and flexible spending accounts. Many employee benefit plans have highly technical aspects and difficult administration that can make using a specialized entity such as a TPA more cost effective than doing the same processing in house.