Waiting for a kidney transplant is a long, active process. The median wait is roughly two to four years depending on your blood type, and during that time you’ll need to stay healthy, keep up with regular testing, and be ready to move quickly when a kidney becomes available. Here’s what that waiting period actually looks like.
How Long the Wait Typically Takes
Your blood type is one of the biggest factors in how long you’ll wait. People with blood types O and B tend to wait the longest, with a median of about 3.8 years. Blood type A averages around 2.7 years, and blood type AB has the shortest median wait at roughly 1.8 years. These are medians, meaning half of people wait longer and half wait less. Some people receive a kidney within months; others wait well over five years.
Your wait time officially starts from the date you began dialysis or the date you were added to the list, whichever came first. This matters because time on dialysis before listing still counts toward your priority. If you were on dialysis for a year before being evaluated and listed, that year is already factored in.
What Determines Your Priority
The national organ matching system uses only medical and logistical factors to rank candidates. Personal characteristics like income, insurance type, or celebrity status play no role. The key factors for kidney allocation are:
- Waiting time: The longer you’ve been waiting (including pre-listing dialysis time), the higher your priority.
- Immune system compatibility: Your CPRA score measures how sensitized your immune system is to donor tissue. A higher score means fewer donors would be compatible with you, so the system gives you higher priority to compensate.
- Distance from the donor hospital: Kidneys need to be transplanted quickly, so proximity matters.
- Prior living donor status: If you previously donated a kidney or part of your liver to someone else and now need a transplant yourself, you receive additional priority.
- Pediatric status: Children receive priority in the matching system.
- Survival benefit: The system considers how much a particular kidney would benefit you compared to other candidates.
You can be listed at more than one transplant center to improve your chances, though each center requires its own evaluation process and may charge separate fees.
Staying Active on the List
Being listed isn’t a one-time event. Most transplant centers require you to return at least once a year for updated medical testing. If your records fall out of date or you miss required tests, your status can be changed from “active” to “inactive,” meaning you won’t be considered for available kidneys until you catch up.
The most important thing you can do is keep your transplant team informed. Report any changes in your health, new diagnoses, hospitalizations, or even a change of address or phone number. If the team can’t reach you when a kidney becomes available, that organ goes to the next person on the list. Many centers expect you to be reachable 24 hours a day and able to get to the hospital within a few hours of the call.
Since 2000, roughly 59,000 kidney transplant candidates have been removed from the waiting list for reasons other than receiving a transplant, dying, or transferring to another center. Health decline is a common reason. If your overall condition deteriorates to the point where surgery becomes too risky, the transplant team may place you on hold or remove you from the list. This is why staying as healthy as possible during the wait isn’t optional; it directly affects whether you’ll still be eligible when your turn comes.
Exercise and Diet During the Wait
The American Society of Transplantation recommends aiming for about two and a half hours of physical activity per week, which breaks down to roughly 30 minutes a day, five days a week. Running, cycling, and swimming are all good options if your body can handle them. Strength training, whether with weights or bodyweight exercises like squats and push-ups, also helps maintain the muscle mass and cardiovascular fitness that improve surgical outcomes and recovery.
Diet matters too, but it doesn’t need to be complicated. Focus on a balance of protein, vegetables, and whole grains. If you’re on dialysis, you likely already have dietary restrictions around potassium, phosphorus, sodium, and fluid intake. Ask your dialysis unit or transplant center to connect you with a dietitian who can build a meal plan around your specific restrictions, your budget, and what you actually like to eat. A plan you’ll follow is better than a perfect plan you won’t.
The Financial Side of Waiting
The financial burden of the transplant process catches many families off guard. Even with insurance, out-of-pocket costs add up: copays for labs, imaging, and specialist visits during the evaluation and waiting period; travel to and from the transplant center for annual check-ups; childcare during appointments; and lost income from time off work. If you have a potential living donor, their post-surgery costs like pain medication can also become a concern, particularly if the donor’s insurance coverage is unclear.
Your transplant center should have a social worker on the team. This person can help you understand what your insurance covers, connect you with financial assistance programs, and plan for the costs that come after transplant, such as the lifelong immunosuppressive medications you’ll need. Don’t wait until a kidney is offered to sort out finances. Reach out to the social worker early and ask specifically about assistance programs for transplant recipients and their donors.
Living Donors Can Change the Timeline
If someone in your life is willing and medically able to donate a kidney, the wait can shrink dramatically. Living donor transplants can be scheduled in advance rather than depending on the unpredictable timing of deceased donor availability. Recipients of living donor kidneys also tend to have better long-term outcomes. The kidney typically functions immediately after surgery because it spends less time without blood flow, and recipients often recover faster.
A living donor doesn’t have to be a family member. Friends, coworkers, or even altruistic strangers can be evaluated. If someone wants to donate but isn’t a match for you, paired exchange programs can pair your donor with another recipient whose donor matches you, so both patients receive compatible kidneys. Your transplant coordinator can walk you through this process.
What Happens When the Call Comes
When a compatible kidney becomes available, your transplant center will call you, often with very little notice. You’ll need to get to the hospital quickly, typically within a few hours. This means having a go-bag packed, a reliable way to get to the hospital at any hour, and a plan for who handles your responsibilities at home while you’re in surgery and recovery.
Keep in mind that getting the call doesn’t always mean the transplant will happen. Sometimes the surgical team determines that the kidney isn’t suitable after closer examination, or a last-minute issue arises. False starts are frustrating but normal. If it happens, you stay on the list and wait for the next match.
Some people receive multiple offers before one leads to an actual transplant. Data on declined offers shows that after turning down a first offer, candidates with blood type O typically wait a median of about 50 days for the next offer, while blood type B candidates may wait around 60 days. Blood types A and AB tend to receive subsequent offers sooner. Declining an offer that doesn’t feel right is your choice, but discuss the trade-offs with your transplant team so you understand what the next opportunity might look like.