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UNOS technology
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Data resources

Allocation calculators

Organ allocation calculators

There are a number of mathematical formulas used in organ allocation. Allocation calculators are important tools that transplant professionals and patients use to determine various scores that influence a candidate’s priority on the waiting list and likelihood of receiving a transplant.

Learn more about allocation calculators



Find toolkits containing policy information, checklists, guidance, reports, and much more by organ type or topic:

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Member resources guide

Links to policies, bylaws, toolkits and other resources. Includes an introductory fundamentals section.

Careers in organ donation and transplantation

Education for professionals and patients

UNOS provides educational resources that support our members and help patients, family members, friends, potential donors and medical professionals understand organ donation and transplantation.

Education resources

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Research and data analytics

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Understand. Compare. Improve.

Access research and data analytics to improve performance and increase transplant:
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Collaborative research: SimUNetSM

For donation and transplant professionals who want to increase transplant, SimUNet simulations offer a way to experiment with how different ways of displaying information (and how different types of information) can affect decision making.

Learn about SimUNet

TransNet and organ transport

Organ transport

Learn about TransNetSM, find upcoming TransNetSM training sessions, order organ labels and learn more about organ packaging, labeling and transport.

Learn more about organ transport

Careers in organ donation and transplantation

UNOS careers

View UNOS careers

Other resources

Living donation

Living and paired organ donation

Learn more about living donation, including living donor requirements, informed consent and frequently asked questions.

Patient safety

Patient safety

Find resources to improve patient safety, such as precautions to prevent disease transmission, guidance for blood subtyping, information about vessels transplantation and tools for best practices, such as templates, corrective action plans and more.

Find patient safety resources

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White papers are available for informational purposes and to stimulate discussion around the complexities of medical/bioethics with donor organ shortages.

Ethics white papers

Calendar of events


Information about professional training events, regional meetings and public comment, celebration, awareness, and educational events. Find information on OPTN Board of Directors and committee meetings on OPTN website.


Glossary of organ donation and transplantation terms


Find definitions for transplantation and donation terms.

View glossary

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