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The MELD (Model for End-Stage Liver Disease) is a score that measures how severe the liver disease is in a person with cirrhosis or another advanced liver condition. It is calculated from routine blood tests and is used, above all, to rank the liver transplant waiting list in a fair way: those with the highest score are the sickest and are given priority to receive an organ.
If you or a relative were told a “MELD,” what you are being given is a number that objectively summarizes the risk of the liver disease over the coming months. It is not a sentence; it is a tool to guide decisions and to allocate available organs to those who need them most.
What is the MELD for?
The MELD serves two main purposes:
- Prioritizing transplantation. In Chile and in many countries, the liver waiting list is ordered by the MELD. The higher the score, the higher the priority, because it reflects a greater risk of dying without a transplant. This replaced older systems based on waiting time, which were less fair.
- Estimating prognosis. The score predicts fairly well the probability of survival over the next three months. That is why it is also used to decide the right time to refer someone to a transplant center and to weigh the risk of certain procedures and surgeries.
It is more objective and reproducible than the older Child-Pugh classification, because it relies only on laboratory values and not on subjective judgments such as the degree of ascites or encephalopathy.
How is it calculated? The move to MELD 3.0
The original MELD, described in 2001, used three tests: bilirubin, creatinine (which reflects kidney function) and the INR (which measures clotting). Over the years the model was refined. In 2016 blood sodium was added, because a drop in sodium (hyponatremia) signals greater severity; that version became known as MELD-Na.
Since 2021 the version in use is MELD 3.0. In addition to bilirubin, creatinine, INR and sodium, it incorporates two new elements:
- Albumin, a protein made by the liver that falls as the disease progresses.
- Sex. It was shown that, with the older score, women were at a disadvantage on the waiting list. MELD 3.0 corrects that disparity and assigns them a priority that better matches their real risk.
In this way, MELD 3.0 combines six elements: bilirubin, creatinine, INR, sodium, albumin and sex. From these it computes a whole number. The exact calculation is done by a mathematical formula, so in practice there is no need to memorize it: you simply enter the laboratory values.
What does the score mean?
The MELD ranges from 6 to 40. The higher the number, the more severe the liver disease and the greater the short-term risk:
- Below 10: more stable disease, with a good short-term outlook.
- 10 to 19: intermediate risk, requiring close monitoring.
- 20 to 29: advanced disease, with growing priority for transplantation.
- 30 or above: a severe situation, with high priority on the waiting list.
These ranges are a guide. What matters is that the score is always interpreted together with each person’s full clinical picture, not in isolation.
Practical points
A few details to keep in mind when reading a MELD:
- It applies to people older than 12 years. Children use a different score (the PELD).
- The result is rounded to the nearest whole number and never falls below 6 or rises above 40.
- If the person is on dialysis, the creatinine value entered is the model’s maximum, because the kidney is not working on its own.
- The score can rise or fall over time as the disease evolves. That is why it is recalculated regularly while a person is on the waiting list.
- Some serious conditions, such as liver cancer, can justify extra priority even when the calculated MELD is low. Those additional points are defined by the transplant program.
A calm perspective
The MELD is a valuable tool, but it is only one part of the assessment. A high number does not mean nothing can be done; on the contrary, it is often the signal that allows timely access to a transplant. And a number that drops after treating complications is good news. Any questions about what your score means are best discussed with the team that follows you, who know your case in detail.
See also
References
- Kamath PS, et al. A model to predict survival in patients with end-stage liver disease. Hepatology. 2001;33(2):464-470.
- Kim WR, et al. Hyponatremia and mortality among patients on the liver-transplant waiting list. N Engl J Med. 2008;359(10):1018-1026.
- Kim WR, et al. MELD 3.0: The Model for End-Stage Liver Disease Updated for the Modern Era. Gastroenterology. 2021;161(6):1887-1895.e4.
- European Association for the Study of the Liver. EASL Clinical Practice Guidelines for the management of patients with decompensated cirrhosis. J Hepatol. 2018;69(2):406-460.
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