Transplant evaluation should be discussed when chronic kidney disease is advanced and kidney failure may be approaching—not only after dialysis begins. A nephrologist may refer someone when kidney function is falling toward the range where transplant listing is possible, often near an eGFR of 20 in the United States, or 6–12 months before dialysis is expected. Starting early leaves time for testing, donor planning, and treating other health problems.
A kidney transplant can be an important treatment option for people whose kidney function is expected to decline to kidney failure. Evaluation is the first step in determining whether transplantation could be suitable and planning for it in advance. It does not mean surgery must happen immediately, and the timing depends on how the kidney disease is progressing, overall health, and the person's treatment preferences.
When should someone with chronic kidney disease be referred for transplant evaluation?
Transplant evaluation is generally considered during advanced chronic kidney disease (CKD), particularly when kidney failure is expected in the future. The KDIGO transplant-candidate guideline summary recommends informing people with advanced CKD who are expected to reach kidney failure about transplantation and considering them for evaluation. It also recommends referring potential candidates at least 6–12 months before anticipated dialysis initiation when possible, allowing time to assess suitability and explore living-donor options. The KDIGO guideline summary provides these recommendations for transplant planning.
For many people, this discussion begins while they are receiving care from a nephrologist, a doctor specializing in kidney disease. The team reviews whether kidney function is declining, how quickly the change is occurring, and whether kidney failure is likely to develop. A person whose kidney function is stable may have a different timeline from someone whose kidney function is declining more quickly.
The National Kidney Foundation advises starting the evaluation early when someone has advanced CKD or their estimated glomerular filtration rate (eGFR) is approaching 20. Evaluation can begin before dialysis, giving the person and transplant team more time to complete assessments, address health concerns, and consider a possible living donor. The National Kidney Foundation's transplant evaluation guide explains why early planning can be helpful.
Does eGFR determine when transplant evaluation is needed?
Estimated glomerular filtration rate, or eGFR, is a measure used to estimate how well the kidneys filter waste from the blood. An eGFR result can help the care team understand the extent of kidney-function loss and follow changes over time. It is not, by itself, a complete assessment of whether someone needs a transplant or is medically suitable for one.
In the United States, a transplant center can place an eligible person on the kidney transplant waiting list when kidney function is at an eGFR of 20 or lower, even if dialysis has not started. The National Institute of Diabetes and Digestive and Kidney Diseases explains this rule in its kidney transplant information. The point at which evaluation can begin is not necessarily the same as the point at which someone qualifies for waiting-list placement. Listing requirements and transplant procedures may differ across countries and healthcare systems.
Doctors also consider the pattern of kidney-function results, the expected course of the disease, other medical conditions, and the person's overall treatment plan. A single result should not be used to decide independently whether transplant evaluation is needed. The nephrologist can explain how the results fit into the person's situation and whether a transplant referral is appropriate now.
Why is it helpful to evaluate for a transplant before dialysis?
Starting the evaluation before dialysis may allow a person to complete the necessary tests and prepare for a transplant while kidney function is being monitored. If a person is eligible and a suitable kidney becomes available at the right time, transplantation may be possible before dialysis starts. This is called a preemptive kidney transplant.
The National Kidney Foundation describes preemptive transplantation as an option for eligible patients who receive a transplant before beginning dialysis. It may allow some people to avoid starting dialysis first, but it cannot be guaranteed because the timing depends on medical suitability, kidney-function changes, and donor availability. The National Kidney Foundation's overview of preemptive transplantation explains the approach and its potential benefits.
Early evaluation also provides time to address issues that could affect transplant planning. Some people need additional testing, treatment for another health condition, or support with practical arrangements before they can proceed. Starting the process early does not guarantee approval or an immediate transplant, but it can reduce the risk that assessment begins only when kidney failure is already requiring urgent treatment.
What happens during a kidney transplant evaluation?
The evaluation is a series of appointments and tests designed to determine whether transplantation is a suitable and reasonably safe treatment option. The exact process depends on the transplant center, the person's medical history, and local requirements. It may take several visits over weeks or months, so the process is best started with enough time to complete any additional assessments that are needed.
Medical history and general health checks
The transplant team reviews the person's kidney disease, other medical conditions, previous operations, current medicines, and overall health. The team may check blood pressure, nutrition, and other factors relevant to surgery and recovery. Medical conditions that could increase the risks of transplantation may need further investigation or treatment before a decision can be made.
Blood tests and donor matching
Blood tests help assess general health, identify certain infections, and determine blood group and tissue characteristics used in donor matching. The team may also assess antibodies that could make it harder to find a compatible kidney. If a living donor is being considered, that person needs a separate evaluation to check whether donating would be safe and whether the kidney can be used for the intended recipient.
Heart, lung, and other specialist tests
The team needs to assess whether a person is likely to tolerate major surgery. Depending on the person's health, tests may include an electrocardiogram, an ultrasound of the heart, a stress test, chest imaging, or other investigations. Additional assessments may be needed to review blood vessels or investigate conditions that could affect transplant safety.
NHS Blood and Transplant explains that transplant testing can include blood group and tissue-type checks, infection screening, antibody testing, and assessments of heart, lung, and blood-vessel health. The exact tests vary with the transplant center and the individual's needs. Its guide to kidney transplant tests describes the main areas that may be assessed.
Medication planning and practical support
Evaluation also considers whether a person understands the care needed after transplantation. A transplanted kidney requires ongoing monitoring and medicines to reduce the risk of rejection. The transplant team may review medication routines, emotional well-being, available support at home, transport to appointments, and financial or insurance arrangements. These discussions help identify support that may be needed during recovery and long-term follow-up.
Does everyone who needs transplant evaluation qualify for a transplant?
No. Evaluation determines whether transplantation is an appropriate option after considering the likely benefits and risks for the individual. Some people are medically suitable, while others may need additional treatment or investigation before the team can decide. Certain serious or uncontrolled health conditions can make surgery or the use of anti-rejection medicines unsafe, and sometimes transplantation is not recommended.
A condition that delays approval does not always mean someone can never receive a transplant. Depending on the problem, treatment or improved control of the condition may allow the team to reconsider eligibility. The transplant team should explain any concerns, whether they can be addressed, and what steps may be possible next.
Age alone does not explain whether a transplant is suitable. The broader assessment considers overall health, other illnesses, frailty where relevant, surgical risk, and the person's ability to manage the treatment and follow-up. A transplant center makes its decision using the person's clinical circumstances and the applicable local criteria.
What if someone is already receiving dialysis?
It is still appropriate to discuss transplant evaluation after dialysis has started. Potential candidates who were not assessed earlier can ask their nephrologist or dialysis team about referral when they are medically stable and transplantation remains a possible treatment option. The team may review earlier test results, arrange new investigations, and determine whether the person is ready to proceed.
Evaluation after dialysis begins may still lead to waiting-list placement or a transplant from a suitable living donor. However, timing and availability depend on eligibility, donor matching, local waiting-list arrangements, and the person's health. Dialysis treatment and transplant assessment can be coordinated so that kidney failure continues to be managed while the transplant decision is made.
What should you ask your nephrologist about transplant evaluation?
A practical starting point is to ask whether the current pattern of kidney function suggests that transplant planning should begin. It can help to discuss the expected course of CKD, the timing of referral, and whether a transplant center needs to review the case now. If kidney failure is approaching, ask how transplant planning fits with other treatment options, including dialysis preparation.
Other useful questions include whether evaluation can start before dialysis, which tests may be needed, whether a living donor could be considered, and what medical issues should be addressed before referral. The care team can also explain how waiting-list rules work in the relevant healthcare system and what to expect if the evaluation finds that more preparation is needed.
Transplant evaluation is a planning process, not a commitment to undergo surgery. Beginning the conversation early helps ensure that transplantation can be considered alongside other kidney-failure treatment options before a decision becomes urgent.