Organ donation is a structured medical and legal process that moves through a specific sequence: identifying a potential donor, confirming legal consent, matching organs to recipients through a national computer system, surgically recovering the organs, and transporting them to hospitals where patients are waiting. In 2024, this system made more than 48,000 transplants possible in the United States, yet over 103,000 people remain on the national waiting list.
The process works differently depending on whether organs come from a deceased donor or a living one. Here’s how both paths work, step by step.
What Happens After a Patient Dies
When a patient is near death or has died in a hospital, federal rules require the hospital to notify the local Organ Procurement Organization, or OPO. These are specialized medical providers that serve as the link between donation and transplantation. There are dozens of OPOs across the country, each covering a specific geographic region. Once notified, the OPO determines whether the patient could be a potential donor. If so, an OPO representative travels to the hospital.
Death must be formally declared before any donation can proceed, and the medical team treating the patient is never the same team involved in transplant surgery. This separation is a core safeguard in the system. Death is determined in one of two ways. In donation after brain death, doctors confirm the irreversible loss of all brain function. In donation after circulatory death, the heart has stopped beating and cannot be restarted, with a required waiting period of 2 to 5 minutes of sustained cardiac arrest before death is declared.
Consent and Medical Evaluation
The OPO’s next task is confirming legal authorization. They check the state donor registry first. If the patient registered as a donor (through a driver’s license or online registry), that counts as legal consent. If the patient isn’t registered, the OPO turns to the closest blood relative or next of kin for permission. For people under 18, parents or legal guardians make this decision.
Once consent is secured, the OPO conducts a thorough medical and social history, gathered largely from the donor’s family. This evaluation determines which organs and tissues are healthy enough to transplant. Age alone doesn’t disqualify someone. Medical history, the condition of specific organs, and other clinical factors determine what can be used.
How Organs Get Matched to Recipients
If the evaluation clears the donor, the OPO enters detailed medical information into a national database run by the Organ Procurement and Transplantation Network (OPTN). This system contains records for every patient in the country waiting for a transplant. It generates a ranked list of potential recipients for each available organ, and transplant teams are contacted in order.
The matching algorithm considers only medical and logistical factors. Celebrity status, income, and insurance coverage play no role. Before any matching begins, patients who are biologically incompatible with the donor (wrong blood type, mismatched body size, or other medical conflicts) are automatically screened out. From there, the system weighs several factors:
- Medical urgency: Patients closest to death without a transplant rank higher for hearts, livers, and lungs.
- Geographic distance: Local candidates generally receive offers before patients at more distant hospitals, because organs have limited time outside the body.
- Likelihood of success: For lungs, the system factors in expected five-year survival after transplant. For kidneys, immune system compatibility plays a major role.
- Pediatric priority: Children have their own scoring system and are essentially first in line for other children’s organs, since proper organ size is critical.
- Time on the waiting list: For kidneys specifically, how long someone has been waiting is a significant factor.
The transplant surgeon for the top-ranked candidate makes the final decision about whether to accept the organ for their patient.
The Clock Starts Ticking
Once organs are surgically removed from the donor, they’re preserved in cold storage and transported by ambulance, helicopter, or commercial airplane to the recipient’s hospital. Each organ has a narrow window of viability. Hearts and lungs last only 4 to 6 hours outside the body. Livers and pancreases need to be transplanted within roughly 12 hours. Kidneys are the most resilient, tolerating up to 24 hours, though shorter times produce better outcomes.
These time constraints are a major reason geographic distance matters so much in the matching system. A heart offered to a patient across the country may not survive the trip. After organ recovery, approved tissues like bone, corneas, and skin can also be recovered. All surgical incisions are closed, and the donor’s body is treated with respect throughout.
Living Donation
Not all organ donation involves deceased donors. Living donors can give one kidney, a segment of the liver, or in rarer cases, a lobe of a lung, part of the pancreas, or part of the intestine. Kidney donation is by far the most common type. Living donors can also provide tissue: skin after cosmetic surgeries, bone after joint replacements, bone marrow cells, and blood products.
To qualify, you must be at least 18 (some hospitals require 21), in good physical and mental health, and fully informed about the risks. The evaluation process is extensive. Expect a complete physical exam, lab work, cancer screenings, a mental health evaluation, and detailed questions about your medical history, social support, and financial readiness to take time off work. The process is designed to protect you as much as the recipient.
Who Pays for Donation
For deceased donation, the donor’s family pays nothing. Organ recovery costs are covered by the transplant system, not billed to the donor’s estate or family.
For living donors, the recipient’s insurance typically covers all donation-related medical costs: your evaluation, surgery, hospitalization, follow-up care, and treatment of any surgical complications. However, if the evaluation turns up a medical condition unrelated to donation, testing and treatment for that condition goes through your own insurance. You’re also responsible for travel, lodging, parking, and time away from work. It is illegal to be paid for being a donor, but recipients can reimburse transplant-related expenses like travel and child care. If that’s not an option, the National Living Donor Assistance Center may help cover some travel costs for eligible donors.
How to Register
In most states, you can register as an organ donor when you get or renew your driver’s license. You can also sign up at any time through your state’s donor registry, typically accessible through organdonor.gov. Registration creates a legally binding record of your decision, which means your family won’t be asked to make that choice during an already difficult time. It’s also worth telling your family directly what you want, since they’ll be the ones the OPO contacts if you’re not in the registry.
One donor can save up to eight lives through organ donation and improve many more through tissue donation. There’s no age limit for registering, and most medical conditions don’t automatically disqualify you. The OPO evaluates each potential donor individually at the time of death.