Skip to main content

Get involved

Volunteer with the OPTN

Every 10 minutes, someone is added to the transplant waiting list. As a member of the donation and transplant community you have an impact on the lives of these people every day.

Get involved


The Organ Procurement and Transplantation Network (OPTN) is a unique public-private partnership that links all professionals involved in the U.S. donation and transplantation system. Also crucial to the system are individuals who sign organ donor cards, people who comment on policy proposals and countless volunteers who support donation and transplantation, among many others.

A driving force of the OPTN is to improve the U.S. system so that more life-saving organs are available for
transplant. Patient safety is at the forefront of activities at transplant hospitals, organ procurement organizations (OPOs) and labs.

The OPTN acts through its Board of Directors and committees, who bring a wealth of commitment and technical knowledge to guide us. Committees address issues of concern in the transplant community. The board establishes and maintains transplant policies (operational rules) and bylaws (membership requirements) that govern the OPTN.

OPTN membership

As of May 21, 2024, OPTN membership included the following:

OPTN Membership
Type of OPTN Member Number
Transplant Centers 248
Organ Procurement Organizations  56
    Independent 49
    Hospital Based 7
Histocompatibility Laboratories  138
    Independent 50
    Hospital Based 88
Public Organizations 8
Individual Members 14
Medical Scientific Organizations 12
Business Members 18
Total 399

note NOTE: There are 7  OPTN members that operate both transplant centers and in-house OPOs and 88 that operate both transplant centers and in-house histocompatibility laboratories. These members are included in the count of transplant centers, operating OPOs, and/or laboratories. For this reason, the total number of members is less than the sum of the different categories.

OPTN contractor

United Network for Organ Sharing (UNOS) was awarded the initial OPTN contract on September 30, 1986, and continues to administer the OPTN today.