MELD / MELD-Na Score: Liver Cirrhosis Assessment (UNOS)
Online MELD and MELD-Na Score calculator. Evaluate end-stage liver disease severity and estimate 3-month mortality for transplant allocation.
Interpretation & Prognosis (UNOS)
The MELD (Model for End-Stage Liver Disease) score is the internationally validated system for prioritizing patients awaiting liver transplantation.
What is the MELD-Na score?
Originally developed in 2001, the classic MELD score uses bilirubin, creatinine, and INR. In 2016, the UNOS system officially integrated Sodium (Na) into the equation, as hyponatremia is an independent predictor of mortality in cirrhosis. This calculator uses the standard MELD-Na equation.
Official Calculation Rules (UNOS)
The calculator automatically applies the following limits:
- Values < 1.0 (for INR, bilirubin, and creatinine) are rounded up to 1.0.
- Creatinine is capped at 4.0 mg/dL. If the patient is on dialysis, creatinine is automatically set to 4.0 mg/dL.
- Sodium is bounded between 125 and 137 mEq/L for the corrective calculation.
Estimated 3-Month Mortality
| MELD-Na Score | 3-Month Mortality |
|---|---|
| ≤ 9 | 1.9 % |
| 10 - 19 | 6.0 % |
| 20 - 29 | 19.6 % |
| 30 - 39 | 52.6 % |
| ≥ 40 | 71.3 % |
References:
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1. Kamath PS, et al. A model to predict survival in patients with end-stage liver disease. Hepatology. 2001.
[Hepatology Journal]
2. Biggins SW, et al. Evidence-based incorporation of serum sodium concentration into MELD. Gastroenterology. 2006.
[Gastroenterology Journal]
3. UNOS (United Network for Organ Sharing) MELD-Na Policy guidelines.
[UNOS Official]
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💡 Committed to scientific accuracy, if you notice any clinical or technical discrepancy, please let us know.