Becoming a living kidney donor starts with contacting a transplant center, either on behalf of someone you know or as an anonymous (nondirected) donor. From there, you’ll go through a medical evaluation, a psychosocial screening, and surgical planning that typically spans several months. The process is designed to protect your health first. If at any point the medical team determines donation poses too much risk to you, or if you change your mind, you can step away.
Who Can Donate
The basic requirements are straightforward. You need to be at least 18 years old, in good physical and mental health, and motivated by a genuine desire to help rather than financial gain or social pressure. Most transplant centers require a BMI below 35, though some will work with you on a weight loss plan to reach that threshold before surgery. If you smoke, you’ll need to quit at least six weeks before the operation.
Certain conditions will disqualify you. Uncontrolled high blood pressure, diabetes, active cancer, HIV, and significant kidney disease are all dealbreakers. Pregnancy also rules out donation, though you can be evaluated after delivery. Beyond that, each transplant center has slightly different cutoffs, so being turned down at one program doesn’t necessarily mean you can’t donate elsewhere.
The Evaluation Process
The donor workup is thorough, and it’s meant to be. Transplant teams are evaluating whether you can safely live with one kidney for the rest of your life, not just whether the surgery itself is safe. Expect the process to take anywhere from a few weeks to several months depending on how quickly tests can be scheduled and results reviewed.
Blood and urine testing come first. Your blood type and tissue markers are checked for compatibility with the recipient. Kidney function is measured to confirm both kidneys are healthy enough that you can thrive with one. You’ll also be screened for infectious diseases including HIV, hepatitis B, and hepatitis C, with testing required within 28 days of the planned surgery. Women who are premenopausal will have a pregnancy test. If you have risk factors for diabetes, you may undergo glucose tolerance testing.
Imaging studies follow. Most centers use either an MRI or a CT scan with contrast to map your kidney anatomy, checking the size, shape, and blood vessel arrangement of each kidney. This helps the surgical team decide which kidney to remove. A chest X-ray is also standard.
You’ll complete age-appropriate cancer screenings as well. Depending on your age and sex, that could include a Pap smear, mammogram, or colonoscopy. The goal is to catch anything that might make surgery risky or compromise your long-term health.
The Psychosocial Screening
Every donor candidate meets with a social worker or psychologist, sometimes both. This isn’t a formality. The evaluation exists to confirm you’re making a voluntary, informed decision and that you have the practical support to get through recovery.
The team will assess your mental health history, looking for active psychiatric conditions, substance use disorders, or significant anxiety and depression that could complicate your experience. They’ll ask about your understanding of the risks and benefits, both for you and the recipient. They want to see realistic expectations. If you believe donation guarantees the recipient will be cured forever, for instance, that’s a concern.
Financial stability matters too. Evaluators look at whether you have health insurance, whether you can absorb potential lost wages during recovery, and whether you have a support system at home. Limited financial resources don’t automatically disqualify you, but they do flag a need for additional planning. Strong motivation, low ambivalence, and a history of altruistic behavior are considered protective factors. Donating to gain publicity, leverage a relationship, or relieve guilt raises red flags.
What If You’re Not a Match
Blood type or tissue incompatibility with your intended recipient doesn’t have to end the process. Kidney paired donation, sometimes called a kidney exchange, lets incompatible donor-recipient pairs swap kidneys with other pairs so that everyone receives a compatible organ. You donate to a stranger whose donor, in turn, gives to your recipient.
These exchanges can also form longer chains. An altruistic donor with no specific recipient in mind kicks off the chain by giving a kidney to someone in an incompatible pair. That pair’s willing donor then gives to the next patient in line, and so on. Some chains stretch across multiple hospitals and are carried out in planned segments over days or weeks, with “bridge donors” connecting one segment to the next. These chains have significantly expanded the number of living donor transplants performed each year.
The Surgery Itself
Nearly all donor surgeries today are done using keyhole (laparoscopic) techniques rather than traditional open surgery. Instead of one large incision, the surgeon makes several small cuts and uses a camera to guide the operation. A Cochrane review found that keyhole surgery results in less pain, lower painkiller use, and shorter hospital stays compared to open surgery. Some centers now use robotic-assisted approaches, which offer similar benefits.
You’ll be under general anesthesia, and the procedure typically takes two to three hours. Most donors stay in the hospital one to two nights afterward. How quickly you’re discharged depends on your pain levels, how well you’re recovering, and how close you live to the hospital.
Recovery Timeline
The first week at home is the hardest. You’ll likely feel sore around the incision sites and fatigued. Pain is manageable with medication, and it improves steadily. You shouldn’t lift anything heavier than a jug of milk for about six weeks after surgery.
Most donors with desk jobs return to work within a couple of weeks. If your job involves physical labor, expect to be out for closer to six weeks, though you may be able to arrange lighter duties with your employer in the interim. Full return to normal activities, including exercise and sports, generally happens within four to six weeks, though your transplant team will want to clear you before you ramp back up.
Long-Term Health After Donation
This is the question most potential donors worry about most. The reassuring answer: long-term survival rates for kidney donors are about the same as for healthy people in the general population who keep both kidneys. Your remaining kidney compensates by growing slightly and filtering more efficiently.
There is a small increase in the lifetime risk of kidney failure after donation, but it’s less than 1%. That risk is somewhat higher for Black men specifically. Transplant centers factor your individual risk profile into their evaluation, and if your baseline risk is elevated due to family history, race, or borderline kidney function, the team may recommend against donation.
You’ll have follow-up appointments after surgery, typically at one, six, and twelve months, then annually. These visits check your kidney function, blood pressure, and urine protein levels to catch any issues early.
Financial Costs and Protections
The recipient’s insurance covers your surgery, hospitalization, and medical evaluation. What it typically does not cover are the indirect costs: travel to and from the transplant center, lodging if you live far away, lost wages during recovery, and childcare. These expenses can add up, and they’re one of the biggest barriers to donation.
The National Living Donor Assistance Center (NLDAC) offers grants to eligible donors to help with travel, lost wages, and dependent care costs. Your transplant coordinator can help you apply. Bipartisan federal legislation called the Living Donor Protection Act has been introduced to go further, aiming to guarantee Family and Medical Leave Act protections for donors and prohibit life insurance, disability insurance, and long-term care insurance companies from denying coverage, limiting policies, or charging higher premiums based on your donation history. As of now, these protections vary by state, so it’s worth asking your transplant center what applies where you live.
How to Get Started
If you want to donate to someone specific, contact the transplant center where that person is listed. You don’t need a referral from your own doctor. If you want to be a nondirected donor, giving a kidney to whoever needs it most, you can reach out to any transplant program and tell them you’re interested in altruistic donation.
The first step is usually a phone screening or online health questionnaire. A transplant coordinator will review your basic health information and, if you look like a reasonable candidate, schedule blood work and the full evaluation. You can withdraw at any point during the process with no obligation and no questions asked. Transplant teams will even provide a medical excuse on your behalf if you want to back out but feel social pressure to continue, telling your intended recipient that you were deemed medically unsuitable rather than disclosing that you chose to stop.