MELD-Na Score Calculator

MELD-Na Score Calculator for Gastroenterology. The base score and sodium-adjusted result describe this historical model only. No automatic listing advice or mortality percentage is generated.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The historical 2016 equation starts with rounded classic MELD. Only when that base exceeds 11, add 1.32 x (137 - sodium) - 0.033 x base x (137 - sodium). Sodium is restricted to 125-137 mmol/L for arithmetic; the final rounded score is restricted to 6-40.

When to use this calculator

Historical MELD-Na calculations and comparison, not current US liver allocation.

Inputs used

  • Total bilirubin (umol/L; US mg/dL)
  • INR
  • Serum creatinine (umol/L; US mg/dL)
  • At least 2 dialysis sessions, or at least 24 hours of continuous venovenous hemodialysis, in the preceding 7 days
  • Serum sodium (mmol/L)

Clinical interpretation

The base score and sodium-adjusted result describe this historical model only. No automatic listing advice or mortality percentage is generated.

Worked example

Bilirubin 6 mg/dL, INR 1.9, creatinine 1.4 mg/dL and sodium 128 give base MELD 24 and MELD-Na 29. At sodium 137 or above, this case gives 24.

Limitations and safety notes

Dialysis uses the historical two-session or 24-hour CVVHD rule. Current MELD 3.0 includes other inputs and cannot be reconstructed from this result.

Frequently asked questions

Does a sodium below 125 keep adding points?

No. This historical policy calculation uses 125 as the lower sodium bound; that mathematical cap is not a treatment target.

What does this result leave unresolved?

Dialysis uses the historical two-session or 24-hour CVVHD rule. Current MELD 3.0 includes other inputs and cannot be reconstructed from this result.

References

  • https://www.hrsa.gov/sites/default/files/hrsa/optn/policy-guid-change_impr-liv-alloc-meld-peld-sta-1a-sta-1b_liv.pdf

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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