Kidney transplantation · Before the transplant
Diabetes is not a reason to wait. It is a reason to hurry.
Diabetic patients are often quietly moved to the back of the queue. The evidence points the other way: they are the group who gain the most from a transplant — and lose the most by waiting.
The short answer
- Yes — diabetes does not disqualify you from a kidney transplant, whether type 1 or type 2.
- Diabetic patients are the group who may see the greatest benefit from transplantation.
- Expected gain in life expectancy is around 10 years, and considerably more in some groups.
- The conversation should begin when eGFR falls below 30, and move quickly below 20.
- The real risk is not the transplant. It is the time spent waiting for one.
Why this question comes up so often
Diabetes is the leading cause of chronic kidney disease worldwide, and its prevalence is still rising. Roughly 40% of patients with end-stage renal disease reached that point through diabetes-related deterioration of kidney function.
In the United States, the rate of kidney failure caused by diabetes rose by 30% between 1992 and 2008. This is not a small subgroup of dialysis patients. In many units it is the largest one.
Which makes it worth asking why so many diabetic patients are told, in one form or another, to wait.
What the evidence actually shows
Type 1 and type 2 diabetics are the group of patients who may see the most benefit from a kidney transplant. That is the opposite of how the question is often framed.
The predicted increase in life expectancy from kidney transplantation is around 10 years — particularly in the diabetic population, whose prognosis on dialysis is poor.
A decision-analysis model published in 2003, examining type 1 diabetic patients specifically, found that living donor kidney transplantation allowed patients to live 18 years longer.1
That transplantation is better than dialysis for both quality of life and survival is, in this population, not seriously disputed.
The cost of waiting
This is the part that rarely gets said plainly, so it is worth stating without softening.
Keeping diabetic patients away from kidney transplantation means accepting that 50% of them will die within two years, and 80% within five.
Every month of delay is drawn from that timeline. Caution is not neutral here — it has a cost, and the cost is measured in survival.
Set against this, the risks that lead to hesitation — surgical risk, the burden of immunosuppression, cardiovascular complications — are real but comparatively modest. They have to be weighed against what happens if nothing is done, and that comparison usually favours transplantation.
When should a diabetic patient start the transplant conversation?
Earlier than most people are told.
| Kidney function (eGFR) | What should be happening |
|---|---|
| Below 30 mL/min | Type 1 diabetic patients should begin the information and decision-making process — learning the options, identifying a potential living donor, starting the workup |
| Below 20 mL/min | That process should accelerate. This is the window in which a transplant before dialysis is still possible |
| Already on dialysis | Still a candidate — but the advantage of pre-emptive transplantation has passed |
If your eGFR is under 30 and no one has raised transplantation with you, that is a question worth asking at your next appointment.
Does my diabetes need to be well controlled first?
Good glycaemic control matters, before and after transplantation — but "get your diabetes under control first" should not become an open-ended delay.
A target HbA1c around 7.0% is generally recommended to prevent or slow progression of diabetic kidney disease. That target is deliberately not pushed lower in patients at risk of hypoglycaemia, where tight control carries its own danger.
The practical question to ask is not "is my control perfect?" but "is my control good enough to proceed, and what specifically would need to change?" A clear answer means progress. A vague one usually means delay.
Are the medications after transplant a problem for a diabetic?
They require management rather than exclusion. Immunosuppressive drugs — steroids in particular — affect blood sugar, and diabetes can also appear for the first time after transplantation in patients who did not have it before.
This is anticipated, monitored and treated. It is a reason for careful follow-up, not a reason to withhold a transplant from someone whose alternative is dialysis.
What this means in practice
- Diabetes is not a contraindication. If you have been refused, establish what the stated reason actually was — it may have been something else entirely.
- A living donor changes the arithmetic. The 18-year figure above came from living donor transplantation specifically.
- Timing is the variable you can still influence. Eligibility rarely improves with waiting; the patient's condition often worsens.
Prof. Dr. Murat Tuncer
Nephrologist and transplant physician. Author of Kidney Transplantation — With Questions and Answers (Istanbul, 2020), written to answer the questions his own patients ask most often.
Find out where you actually stand
Send us your recent kidney function tests, HbA1c and any transplant assessment you have already had. We will tell you honestly whether transplantation is realistic — and how urgent it is.
Medical disclaimer. This article is general information adapted from a published book. It is not personal medical advice, it does not establish a doctor–patient relationship, and it cannot replace assessment by the physician treating you. Treatment targets and transplant criteria differ between patients and between centres. Always consult your own nephrologist or transplant centre before making decisions about your treatment.
References
- Knoll G, Nichol G. Dialysis, kidney transplantation or pancreas transplantation for patients with diabetes mellitus and renal failure: a decision analysis of treatment options. J Am Soc Nephrol 2003;14:500–15.
- United States Renal Data System. Annual Data Report — incidence, prevalence, patient characteristics and treatment modalities.
- Turkish Society of Endocrinology and Metabolism. Diagnosis, treatment and follow-up guide for diabetes mellitus and its complications, 2013.
- Knoll G, Cockfield S, Blydt-Hansen T, et al. Canadian Society of Transplantation consensus guidelines on eligibility for kidney transplantation. CMAJ 2005;173(10).
