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.
Who to contact for membership changes
- If you are an OPTN member transplant hospital, organ procurement organization, or histocompatibility lab, please use the Member Community Portal to submit membership-related requests. For technical assistance related to the Member Community Portal, please contact the UNet Help Desk at 800-978-4334.
- If you are a business or individual user, please submit any applications to MembershipRequests@unos.org.
- Routine account (add/remove/modify) requests should be processed in about 2 business days. If more information is needed, someone will follow up with you.
- Inquiries related to membership application questions, membership application status, safety, and/or compliance with membership policy should email OPTNmembercompliance@hrsa.gov.
- Prospective members should continue to contact membershiprequests@unos.org to obtain and submit completed membership application forms.
Unlike new membership applications and key personnel changes, administrative and routine account requests do not go through MPSC review and therefore have a faster turnaround time of just a few business days. The following is a list of administrative actions, which should be submitted through the Member Community Portal:
- Changes for existing OPTN representatives, and OPTN alternate representatives
- OPO key personnel
- Primary program administrator
- Primary data coordinator
- Additional surgeon or physician
- Site access administrator
- HOPE act variance request, renewals & withdrawals
- Program Director
Member actions
Learn more about member actions:
- Members Not in Good Standing (MNIGS)
- Probation
OPTN membership
As of November 4, 2025, OPTN membership included the following:
| Type of OPTN Member | Number |
|---|---|
| Transplant Hospitals | 252 |
| Organ Procurement Organizations* | 55 |
| Independent | 48 |
| Hospital Based | 7 |
| Histocompatibility Laboratories* | 137 |
| Independent | 48 |
| Hospital Based | 89 |
| Public Organizations | 10 |
| Individual Members | 15 |
| Medical Scientific Organizations | 11 |
| Business Members | 54 |
| Total | 438 |
*Note: There are seven OPTN members that operate both transplant hospitals and in-house OPOs and 89 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.