- Enter the candidate's age in years (the EPTS is for adult kidney-transplant candidates).
- Indicate whether the candidate has diabetes of any type — diabetes carries the most weight in the score.
- Indicate whether the candidate has had a prior solid-organ transplant (any organ).
- Enter the years on dialysis. If the candidate is being listed pre-emptively and has not yet started dialysis, enter 0.
- The raw EPTS, the EPTS percentile, and the allocation note update automatically once the age and both selections are provided.
All computation runs in your browser; no values are stored or transmitted.
When to Use
Use the EPTS score for an adult candidate being evaluated or listed for a deceased-donor kidney transplant. EPTS estimates the candidate's likelihood of longer post-transplant survival relative to other candidates, and it is the candidate-side input to the longevity-matching component of the U.S. Kidney Allocation System (KAS): candidates in the top 20% of expected post-transplant survival (EPTS ≤ 20%) are offered the highest-longevity deceased-donor kidneys (KDPI ≤ 20%) first, to pair the kidneys expected to last longest with the candidates expected to benefit longest.
Appropriate population
Adult deceased-donor kidney-transplant candidates. The score is computed from four readily available factors — candidate age, diabetes status, history of any prior solid-organ transplant, and time on dialysis — and is meant for relative ranking among candidates, not for an individual yes/no transplant decision.
When NOT to rely on it
EPTS is not validated in pediatric candidates and is not used to decide whether a particular patient should be transplanted. It uses only four variables and deliberately omits many clinically relevant factors (cardiovascular disease, frailty, BMI, sensitization, etc.), so it does not replace a full transplant evaluation. The percentile is defined against a specific U.S. waitlist reference population and an official OPTN mapping table that is periodically updated — for an allocation-grade value always use the current official OPTN EPTS calculator.
Pearls & Pitfalls
Lower EPTS is "better"
A lower EPTS percentile means longer expected post-transplant survival. The 20% threshold is the one that matters operationally: an EPTS ≤ 20% unlocks priority access to KDPI ≤ 20% kidneys under longevity matching. As age and time on dialysis rise, the raw EPTS — and therefore the percentile — rises, lowering expected post-transplant survival.
Diabetes and dialysis time dominate
Diabetes adds a large fixed term to the raw score and also modifies the age, prior-transplant, and dialysis terms. Pre-emptive listing (zero days on dialysis) earns a favorable adjustment, which is one reason early referral before dialysis is advantageous. Prior solid-organ transplant raises the score.
Pitfalls
(1) Years on dialysis is calendar time since chronic dialysis began, not the time since listing — enter 0 only for a truly pre-dialysis (pre-emptive) candidate. (2) The raw-EPTS → percentile mapping is an official OPTN lookup table that is refreshed periodically; a percentile from any third-party tool (including this one) is an approximation of that table and can drift between updates. (3) EPTS is a relative ranking metric, not an individual survival probability. (4) Always verify an allocation-relevant score with the official OPTN EPTS calculator.
Why Use It
Deceased-donor kidneys are a scarce resource, and the Kidney Allocation System uses EPTS together with the donor-side KDPI to pair the longest-lasting kidneys with the candidates expected to benefit the longest. Knowing a candidate's EPTS percentile helps the transplant team set expectations, counsel patients about likely waiting times and the kinds of offers they will see, and recognize the value of modifiable timing factors — most notably early, pre-emptive listing before dialysis. Because the score is simple and uses only four routinely available variables, it can be estimated at the bedside or in clinic during transplant evaluation, with the official OPTN calculator reserved for the allocation-grade value.
EPTS — Estimated Post-Transplant Survival
Enter the candidate's age, diabetes status, prior solid-organ transplant status, and years on dialysis (0 if not yet on dialysis). The raw EPTS, the approximate EPTS percentile, and the longevity-matching allocation note appear once the age and both selections are provided.
⚕ Raw-EPTS coefficients per OPTN, A Guide to Calculating and Interpreting the Estimated Post-Transplant Survival (EPTS) Score (2024 revision). The percentile shown here is APPROXIMATE — the official raw-EPTS → percentile conversion is an OPTN lookup table updated periodically against the current U.S. waitlist, which is not reproduced here. For an allocation-grade EPTS percentile always use the official OPTN EPTS calculator: optn.transplant.hrsa.gov → EPTS calculator. For licensed clinicians; not a substitute for individualized assessment.
Next Steps
Use the EPTS percentile to anticipate the kinds of offers a candidate will see and to counsel on modifiable timing.
- EPTS ≤ 20%: the candidate is in the longevity-matched group and receives priority offers for the highest-longevity (KDPI ≤ 20%) deceased-donor kidneys. Counsel that these high-quality offers may come, and weigh accepting them against continued waiting.
- EPTS 21–100%: the candidate is not in the top-longevity tier; offers will span the broader KDPI range. Optimize comorbidities and discuss living-donor options, which bypass the deceased-donor longevity-matching algorithm entirely.
- Pre-emptive / early listing: listing before dialysis (years on dialysis = 0) carries a favorable EPTS adjustment — refer for transplant evaluation early, before chronic dialysis begins where feasible.
- Pair this with the donor-side KDPI & KDRI calculator to understand longevity matching from both sides, and track graft function over time with the allograft eGFR trend tool.
Evidence & References
Raw EPTS Formula
| Term | Contribution to raw EPTS |
|---|---|
| Age | 0.047 × max(age − 25, 0) |
| Age × diabetes | − 0.015 × DM × max(age − 25, 0) |
| Prior transplant | + 0.398 × prior_transplant |
| Prior transplant × diabetes | − 0.237 × DM × prior_transplant |
| Years on dialysis | + 0.315 × ln(years_dialysis + 1) |
| Dialysis × diabetes | − 0.099 × DM × ln(years_dialysis + 1) |
| No dialysis (pre-emptive) | + 0.130 × (years_dialysis = 0 ? 1 : 0) |
| No dialysis × diabetes | − 0.348 × DM × (years_dialysis = 0 ? 1 : 0) |
| Diabetes | + 1.262 × DM |
DM = 1 if any diabetes else 0; prior_transplant = 1 if any prior solid-organ transplant else 0. Raw EPTS in the OPTN reference population ranges roughly 0.01–3.84. The raw score is then converted to an EPTS percentile (0–100%) using an official OPTN mapping table derived from the current U.S. adult kidney waitlist (2024 revision). That full lookup table is not reproduced here, so the percentile in this tool is an approximation of the official conversion; obtain the allocation-grade value from the official OPTN EPTS calculator.
Interpretation
| EPTS percentile | Interpretation |
|---|---|
| ≤ 20% | Highest expected post-transplant survival — priority for KDPI ≤ 20% kidneys (longevity matching) |
| 21–60% | Intermediate expected post-transplant survival |
| 61–100% | Lower expected post-transplant survival |
References
- Organ Procurement and Transplantation Network (OPTN). A Guide to Calculating and Interpreting the Estimated Post-Transplant Survival (EPTS) Score. 2024 revision. Available at: optn.transplant.hrsa.gov.
- Israni AK, Salkowski N, Gustafson S, et al. New national allocation policy for deceased donor kidneys in the United States and possible effect on patient outcomes. J Am Soc Nephrol. 2014;25(8):1842–1848. doi:10.1681/ASN.2013070784.
- Clayton PA, McDonald SP, Snyder JJ, Salkowski N, Chadban SJ. External validation of the estimated posttransplant survival score for allocation of deceased donor kidneys in the United States. Am J Transplant. 2014;14(8):1922–1926. doi:10.1111/ajt.12761.
