MELD-Na Score Calculator
Calculate Model for End-Stage Liver Disease with Sodium correction for liver transplant prioritization.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
MELD Score
6
MELD-Na Score
6
How to Use This Calculator
- Enter Serum Creatinine in mg/dL, Total Bilirubin in mg/dL, and INR from current labs.
- Enter Serum Sodium in mEq/L and indicate whether the patient is on Dialysis.
- Review MELD Score and MELD-Na Score — MELD-Na is used for liver transplant allocation.
- Check Estimated 3-Month Mortality percentage and Transplant Priority Level.
- Use the score to monitor disease progression at follow-up visits and guide referral timing.
How the result changes with Serum Creatinine (mg/dL)
| Serum Creatinine (mg/dL) | MELD Score | MELD-Na Score |
|---|---|---|
| 1.09 | 7 | 7 |
| 3.56 | 19 | 19 |
| 6.54 | 20 | 20 |
| 9.01 | 20 | 20 |
What each input means
- Serum Creatinine (mg/dL)
- Serum creatinine in mg/dL. Values are clamped to 1.0–4.0 per UNOS policy. Set to 4.0 if on dialysis.
- Total Bilirubin (mg/dL)
- Total serum bilirubin in mg/dL. Minimum value of 1.0 used in formula.
- INR
- International Normalized Ratio. Minimum value of 1.0 used in formula.
- Serum Sodium (mEq/L)
- Serum sodium in mEq/L. Clamped to 125–137 for MELD-Na calculation.
- On Dialysis (0=No, 1=Yes)
- If patient had dialysis ≥2 times in the prior week, set to 1 (creatinine becomes 4.0).
What each result means
- MELD Score
- Standard MELD score (6–40) without sodium correction.
- MELD-Na Score
- MELD score with sodium correction (6–40). Used by UNOS for transplant allocation.
- Est. 3-Month Mortality (%)
- Approximate 3-month mortality based on MELD-Na score range.
- Transplant Priority (1–4)
- 1 = lower priority (MELD-Na <12), 2 = moderate (12–17), 3 = high (18–24), 4 = very high (≥25).
- Na Used in Calc (mEq/L)
- Sodium value after clamping to 125–137 range.
- Cr Used in Calc (mg/dL)
- Creatinine value after clamping (1.0–4.0) or dialysis adjustment.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersSerum Creatinine (mg/dL) = 1, Total Bilirubin (mg/dL) = 1, INR = 1, Serum Sodium (mEq/L) = 137 = 5 input(s) provided
- Calculate MELD ScoreMELD Score = round(max(6, min(40, meldRaw)))6 = 6
- Calculate MELD-Na ScoreMELD-Na Score = round(max(6, min(40, meldNaRaw)))6 = 6
- Calculate Est. 3-Month Mortality1.9 = 1.9%
- Calculate Transplant Priority1 = 1
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