Arrangement of several health care organizations rendering a network of medical services (facilities, physicians, ancillary service providers) to a specific population or geographical area. An advanced IDS form combines an insurance or third-party administrator so that there is no division between provider and payer. Also known as integrated delivery network, integrated medical system (IMS), integrated healthcare system (IHS), integrated healthcare organization (IHO), integrated service network (ISN), integrated health delivery network , or organized care system .