 In the United States, there are a total of 58 Organ Procurement Organizations (OPOs) that are responsible for evaluating the candidacy of deceased donors for organ donation as well as coordinating the procurement of the organs.Each OPO is responsible for a particular geographic region and is under the regulation of the Organ Procurement and Transplantation Network.The United States is divided into 11 geographic regions by the Organ Procurement and Transplantation Network.