Transplant Guide
How Organ Procurement Works
The infrastructure that connects organ donors with transplant recipients, from hospital notification to organ recovery and transport.
This guide in one line
Transplant centers are geographically concentrated -- the top 10 states alone hold 55% of all 237 tracked centers -- which is exactly why OPO service-area geography, not just OPO performance, shapes so much of the wait-time variation this guide describes.
- Most centers, single state
- Texas: 26
- Top-10-state share of all centers
- 55%
- OPOs nationally
- 57
What Is an OPO?
Organ Procurement Organizations (OPOs) are federally designated organizations responsible for coordinating organ donation within specific geographic service areas. There are 57 OPOs in the United States, each covering a defined region and working with hospitals to identify potential donors, obtain family authorization, and coordinate organ recovery and allocation.
OPOs are the critical link between a potential donor in a hospital and the transplant centers that will perform the surgery. Without OPO coordination, the complex logistics of organ recovery, preservation, and transport would be impossible within the narrow time windows required.
The Donation Process: Step by Step
When a patient dies in a hospital under circumstances that may allow organ donation, federal law (the Conditions of Participation) requires the hospital to notify the local OPO. The process then unfolds in several stages:
1. Referral and evaluation. The OPO assesses whether the patient is a medically suitable donor based on age, cause of death, medical history, and organ function. Not all deaths result in viable donation, only about 1-2% of hospital deaths occur under circumstances that allow organ donation.
2. Family authorization. OPO staff approach the family to discuss donation and obtain authorization. Even if the deceased was a registered organ donor, families play a significant role in the process. Authorization rates vary by OPO and are a key performance metric.
3. Medical management. Once authorization is obtained, the OPO manages the donor medically to preserve organ function. This can involve maintaining blood pressure, oxygenation, and other vital functions for hours while matching and logistics are coordinated.
4. Matching and allocation. The OPO enters donor information into the UNOS matching system, which generates ranked lists of potential recipients for each recoverable organ. Transplant centers are contacted and either accept or decline each organ offer.
5. Recovery and transport. Surgical teams recover the organs (sometimes from the local transplant center, sometimes from teams that fly in from other centers). Organs are preserved in cold perfusion solutions and transported, often by chartered flight, to the recipient's transplant center.
OPO Performance Variability
OPO performance varies significantly across the country, and this variation directly affects how many organs are available for transplant in each region. HRSA and CMS track several performance metrics:
- Donation rate: Donors per million population in the service area
- Conversion rate: Percentage of eligible donors who become actual donors, ranges from under 50% to over 80% nationally
- Organs recovered per donor: The average number of usable organs from each donor, higher values indicate more efficient recovery
Recent CMS reforms (finalized in 2022) established outcome measures that require OPOs to meet performance benchmarks or face decertification. This represented the first meaningful accountability mechanism for OPOs in decades and is expected to increase organ recovery rates nationwide.
How OPOs Relate to Transplant Centers
Transplant centers within an OPO's service area receive priority for locally recovered organs before they are offered regionally and nationally. This geographic proximity is why patients on waiting lists at centers in high-donation areas may have shorter wait times, not because the center is better, but because the local OPO recovers more organs.
When evaluating transplant centers on PlainTransplant, keep in mind that a center's transplant volume is partly a function of its OPO's performance. Browse our transplant center directory and state pages to see how transplant activity varies geographically.
These 10 states alone hold 55% of all tracked centers. Center concentration tracks population and OPO service-area geography more than any single OPO's raw performance -- a big reason two patients with identical medical urgency can face very different realistic timelines depending on where they list.
Frequently Asked Questions
What is an Organ Procurement Organization (OPO)?
OPOs are federally designated organizations responsible for coordinating organ donation in specific geographic service areas. There are 57 OPOs in the US, each working with hospitals to identify donors, obtain authorization, and coordinate recovery.
How long does the organ procurement process take?
Typically 12 to 24 hours from declaration of brain death to organ recovery. Organs must be transplanted within specific preservation windows, 4-6 hours for hearts, up to 24 hours for kidneys.
Do OPO performance differences affect transplant outcomes?
Yes. OPO conversion rates range from under 50% to over 80%. Higher-performing OPOs recover more organs per donor. CMS reforms now require OPOs to meet benchmarks or face decertification.
Reading this guide
- OPOs coordinate donation within their own geographic service area -- performance and local center density both shape wait times.
- Transplant centers cluster geographically (top 10 states hold 55% of all tracked centers) -- where you list is a real lever. Browse state pages
- CMS reforms now require OPOs to meet performance benchmarks or face decertification -- expected to raise recovery rates nationwide over time. Waiting list guide
OPO performance figures are national program-level statistics, not a guarantee for any specific patient or hospital.
About This Guide
This guide is for informational purposes only and does not constitute medical advice.
Sources: HRSA, UNOS, OPTN, SRTR, CMS Final Rule on OPO Conditions for Coverage.
PlainTransplant’s data pages are rendered directly from SRTR Program-Specific Reports, no number on them is typed in by an editor. This page is written explanation rather than a data page, and any illustrative figures in it are labelled as illustrative. Written explanation of how the SRTR measures work; the center-level numbers behind it live on the data pages this guide links to. See our editorial standards & corrections policy, the methodology behind these numbers, or report a correction.
How to use PlainTransplant data for your decision
Start with the waiting list guide to understand the allocation system, then use the transplant center directory to compare programs in your region against national benchmarks. For survival-rate interpretation, read what survival rates mean - raw numbers without risk-adjustment context can be misleading. Finally, the center-selection guide walks through how volume, waitlist size, and acceptance criteria interact. The center-level metrics we publish are rendered from SRTR Program-Specific Reports (November 2025); this guide is our written explanation of what those measures mean. Use the numbers as inputs to a conversation with your transplant team, not as a substitute for it.