The MELD score is used by UNOS to determine need for liver transplant in patients > 12 years old.

 

Creatinine > 4mg/dL is the maximum used by the MELD score. If dialysis twice within the past week, the creatinine used in the formula = 4mg/dL.

The average MELD score for those undergoing liver transplant is ~20 (varies by location)

MELD score = [ 0.957 * loge(Cr) + 0.378 * loge(Total Bili) + 1.120 * loge(INR) + 0.643 ] * 10
where Cr is 1-4, Bilirubin is ≥ 1, and INR is ≥ 1

UNOS MELD / PELD Documentation. Accessed 8Apr2015. Text