The National Marrow Donor Program (NMDP) is a nonprofit organization founded in 1988, operating the Be The Match Registry®, the largest hematopoietic cell registry globally. It maintains a database of over 22 million volunteer marrow donors and more than 300,000 cord blood units, serving patients with leukemia and other serious blood diseases who require transplants.

NMDP's mission focuses on facilitating transplants from unrelated volunteer donors. It manages a network of hospitals, blood banks, and transplant centers to coordinate donor matching, collection, and transplantation logistics. The organization actively recruits donors, particularly from underrepresented ethnic and racial groups, to enhance the diversity of available matches. Additionally, NMDP offers patient advocacy services to support families with medical and financial concerns related to transplantation.

The Be The Match Registry® and related cord blood program are key resources for patients in need. NMDP covers all expenses related to the donation process and provides comprehensive support to donors throughout their journey.