About OPTN membership

Currently, every transplant hospital program, organ procurement organization, and transplant histocompatibility laboratory in the United States is an OPTN member. Membership means that their institution meets OPTN requirements and that they play an active role in forming the policies that govern the transplant community.

Other OPTN members include: voluntary health organizations, such as the National Kidney Foundation; general public members, such as ethicists and donor family members; and medical professional/scientific organizations, such as the American Society for Transplantation.

Individuals from member organizations participate in the decision-making process through representation on committees and on the board of directors.

OPTN members are responsible for notifying membership of changes or errors in staffing or links appearing in this directory. Please send additions, changes or concerns to membershiprequests@unos.org.

Member actions

Learn more about member actions:

• Members Not in Good Standing (MNIGS)
• Probation

OPTN membership

As of December 22, 2024, OPTN membership included the following:

OPTN Membership

Type of OPTN Member	Number
Transplant Hospitals	250
Organ Procurement Organizations	55
Independent	48
Hospital Based	7
Histocompatibility Laboratories	138
Independent	50
Hospital Based	88
Public Organizations	10
Individual Members	16
Medical Scientific Organizations	11
Business Members	20
Total	405

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