Everything You Need to Know About Kidney Transplant
A kidney transplant is a surgical procedure that replaces a failed kidney with a healthy one from a donor. It is the most effective long-term treatment for end-stage kidney disease (ESKD) and chronic kidney failure, offering better quality of life and longer survival than dialysis for most patients. In 2023, more than 27,000 kidney transplants were performed in the United States, making it the most common solid organ transplant in the country. Here is a comprehensive overview of the procedure, the process of getting one, and what life looks like afterward.
What is a kidney transplant?
A kidney transplant involves placing a healthy donor kidney into the recipient’s body to take over the function of one or both failed native kidneys. The transplanted kidney is typically placed in the lower abdomen, where it is connected to nearby blood vessels and the bladder. The recipient’s original kidneys are usually left in place unless they are causing specific complications such as infection, high blood pressure, or pain.
The transplanted kidney generally begins producing urine and filtering blood shortly after surgery — sometimes within minutes for a living-donor kidney, or within days for a deceased-donor kidney. This restoration of kidney function eliminates the need for dialysis in most cases.
Who needs a kidney transplant?
Kidney transplants are indicated for patients with end-stage kidney disease, defined as kidney function below approximately 15% of normal (glomerular filtration rate below 15 mL/min/1.73m²). The most common underlying causes of ESKD that lead to transplant evaluation include:
- Diabetic nephropathy — Kidney damage caused by long-term diabetes, the leading cause of ESKD in the United States.
- Hypertensive kidney disease — Damage from chronic, uncontrolled high blood pressure, the second leading cause.
- Glomerulonephritis — Inflammation of the kidney’s filtering units, including IgA nephropathy and lupus nephritis.
- Polycystic kidney disease (PKD) — A hereditary condition in which cysts replace functional kidney tissue over time.
- Congenital or structural abnormalities — Kidneys damaged by birth defects or recurrent infections.
Not all patients with kidney failure are candidates for transplant. Factors that may disqualify a candidate include active cancer, severe heart disease, active infection, significant obesity, or a history of non-adherence to medical treatment. Transplant centers conduct an extensive medical and psychosocial evaluation before listing a patient.
Types of kidney donors
Kidneys for transplant come from two sources:
Living donors
A living donor is a healthy person — often a family member, friend, or sometimes an anonymous altruistic donor — who voluntarily donates one kidney. Because humans can live healthy lives with a single kidney, living donation is medically and ethically established. Living-donor kidneys have better outcomes than deceased-donor kidneys: graft survival at 5 years is approximately 85-90% for living-donor transplants versus 75-80% for deceased-donor transplants, according to data from the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Living-donor surgery can often be scheduled in advance, reducing wait times from years to months.
Deceased donors
Deceased donors are individuals who have died — typically from brain death or cardiac death — and whose families have consented to organ donation. Deceased-donor kidneys are allocated through the national transplant system administered by the United Network for Organ Sharing (UNOS) in the United States. The waiting time for a deceased-donor kidney varies significantly by blood type and geographic region, ranging from under one year to over five years in some areas.
The transplant waiting list
As of 2024, more than 100,000 people in the United States are on the kidney transplant waiting list — the largest waiting list of any organ. Each year, roughly 22,000-27,000 kidney transplants are performed, meaning demand significantly exceeds supply. Patients are ranked on the waiting list based on factors including:
- Time on the waiting list
- Blood type and tissue compatibility with available donors
- Medical urgency
- Geographic proximity to the donor hospital
- Whether the patient has had prior transplants
Patients can pursue living donation simultaneously while on the deceased-donor waiting list, which is typically the fastest route to transplant.
The kidney transplant procedure
Kidney transplant surgery is performed under general anesthesia and typically takes 2-4 hours. The surgical team makes an incision in the lower abdomen, places the donor kidney in the pelvic region, and connects the donor’s renal artery and vein to the recipient’s iliac vessels. The ureter — the tube connecting the kidney to the bladder — is then attached to the recipient’s bladder.
Hospitalization following transplant surgery typically lasts 3-7 days for uncomplicated cases. The transplant team monitors kidney function closely during this period, tracking urine output, creatinine levels, and other markers of graft function. According to the Mayo Clinic, most patients experience a significant improvement in energy and quality of life within weeks of a successful transplant.
Immunosuppression after transplant
The transplanted kidney is a foreign organ, and the recipient’s immune system will attempt to reject it unless suppressed. This requires lifelong immunosuppressive medication. Standard regimens typically include a combination of:
- Calcineurin inhibitors (tacrolimus or cyclosporine) — the cornerstone of most regimens
- Antimetabolites (mycophenolate mofetil or azathioprine)
- Corticosteroids (prednisone), often tapered over time
Immunosuppressive medications reduce the risk of rejection but also suppress the immune system broadly, increasing the risk of infections and certain cancers. Managing these trade-offs — maintaining adequate immunosuppression without over-suppression — is a central challenge of post-transplant care. Patients must take medications exactly as prescribed and cannot discontinue them without medical guidance.
Rejection: types and treatment
Rejection occurs when the immune system attacks the transplanted kidney. There are several types:
- Hyperacute rejection — Occurs within minutes to hours of transplant due to pre-existing antibodies. Rare with modern crossmatch testing.
- Acute rejection — Occurs days to months post-transplant. Usually treatable with high-dose corticosteroids or other agents if caught early. Symptoms may include decreased urine output, fever, and tenderness over the transplant site.
- Chronic rejection — Gradual loss of kidney function over months to years, often due to antibody-mediated damage. Less reversible than acute rejection.
Regular follow-up appointments, blood tests, and occasional kidney biopsies allow the transplant team to detect rejection early and intervene before irreversible damage occurs.
Life after kidney transplant
A successful kidney transplant offers a return to near-normal kidney function and significant improvement in quality of life. Most patients are discharged from dialysis after transplant and can return to work, exercise, and most normal activities within weeks to months. Diet restrictions are significantly relaxed compared to dialysis, though some food-drug interactions with immunosuppressants require attention. Patients navigating post-surgical recovery from abdominal procedures may also find relevant guidance in our overview of gallbladder removal surgery recovery and diet.
Kidney graft survival rates at 1 year exceed 95% at experienced centers. Five-year survival rates are approximately 85-90% for living-donor kidneys and 75-80% for deceased-donor kidneys. The transplanted kidney does not last forever in most cases — the median graft survival for a deceased-donor kidney is approximately 12-15 years — so some recipients eventually return to dialysis or receive a second transplant.
Frequently asked questions about kidney transplants
How long does a kidney transplant last?
The median survival of a deceased-donor kidney transplant is approximately 12-15 years; living-donor kidney transplants typically last somewhat longer, with many functioning well beyond 15-20 years. Survival depends on many factors including the recipient’s underlying disease, adherence to immunosuppression, and whether rejection episodes occur. Some transplanted kidneys function for 25+ years; others fail sooner. A second transplant is possible if the first one fails.
Can you live a normal life after a kidney transplant?
Most patients report significantly improved quality of life after a successful kidney transplant compared to dialysis. They can return to work, exercise, travel, and most normal activities. Lifelong medication adherence is required, and patients face a modestly elevated risk of infections and certain cancers due to immunosuppression. Regular medical follow-up is essential. Many transplant recipients live decades with a functioning graft and full, productive lives.
What are the risks of kidney transplant surgery?
Kidney transplant surgery carries the same general risks as any major abdominal surgery: bleeding, infection, blood clots, and anesthetic complications. Transplant-specific risks include delayed graft function (the kidney takes days or weeks to start working fully), primary non-function (the kidney never works), and surgical complications involving the transplant’s blood vessels or ureter. These risks are significantly reduced at high-volume transplant centers with experienced surgical teams.
Who pays for a kidney transplant?
In the United States, Medicare covers kidney transplants for nearly all patients with ESKD under the Medicare ESRD program, regardless of age. This coverage extends to 36 months of immunosuppressive medication costs after transplant, after which patients under 65 may lose coverage unless they have other insurance. Medicaid and private insurance also cover transplants in most cases. The transplant team’s social work and financial coordination staff help patients navigate coverage and assistance programs.
Can a living donor donate a kidney safely?
Yes. Living kidney donation is medically well-established and has been practiced since the 1950s. Donors undergo extensive screening to confirm they have two healthy kidneys and no conditions that would make donation risky. After donation, a healthy person can live a full life with one kidney — the remaining kidney compensates by increasing its function. The long-term risk of kidney failure in carefully screened donors is slightly higher than in non-donors but remains low in absolute terms. The NIDDK and major transplant organizations publish detailed donor health information for those considering donation.
