Strengthening the world’s best organ donation and transplant system

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UNet is the electronic platform designed, built, continuously updated and maintained by UNOS over the course of 30 years for fulfilling requirements of the OPTN contract. UNet is a centralized computer network that links all 57 OPOs, 254 transplant hospitals and 150 histocompatibility labs. Thousands of transplant professionals access this secure web-based transplant platform each day to list patients for transplant, match patients with available donor organs and submit required OPTN data. UNOS developed UNet to enable members to submit, store, manage and display OPTN data using a secure, efficient, reliable and web accessible platform. The UNet platform includes:


With Waitlist, transplant hospitals are able to manage information about their patients in need of transplant. Waitlist uses a series of complex algorithms to calculate a patient’s medical urgency and predicted transplant benefit.


DonorNet provides OPOs the ability to add and modify donor data, execute match runs, make electronic organ offers and supplement the donor record with related medical information and source documents. Transplant hospitals view posted donor information and record organ acceptance and refusal decisions on all organ offers.

DonorNet MobileSM

DonorNet Mobile provides OPOs the ability to perform second verification of donor ABOs and upload attachments to the donor record. Transplant centers have the ability to view and respond to their organ offers. The secure application can be accessed from any mobile device. 


UNet Application Programming Interfaces (API) allow OPTN data about donors, candidates and recipients to be transmitted to or from the UNet system from a validated Electronic Health Record system (EHR) securely and seamlessly. Learn how UNet APIs can increase efficiency.


TIEDI enables OPTN members to access and complete donor, candidate, and recipient-specific electronic data-collection records.


TransNet provides OPOs the ability to create electronic labels for packaging and labeling all deceased donor organs for transplant or research. Transplant centers are able to perform organ check in and electronically match the organ to the recipient. Learn more about TransNet.

Access UNetSM

Enter data about candidates, recipients and donors here:

Access UNet

Important COVID-19 updates and latest data

System changes

Find changes to UNet (also called system notices) here.

UNOS customer service

Get assistance to change permissions and find data reporting and modification request forms.

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