MELD-Na Score — Liver Disease Severity and Transplant Allocation

The MELD-Na (Model for End-Stage Liver Disease incorporating Sodium) is the current standard scoring system used by UNOS/OPTN for liver transplant organ allocation in the United States (adopted 2022). MELD-Na adds sodium-based correction to the original MELD score, improving mortality prediction in patients with hyponatremia-associated portal hypertension. It estimates 90-day liver-related mortality in patients with end-stage liver disease.