The scoring system used to measure illness severity in liver transplant candidates. This system is used in the allocation of livers to adults, established in February 2002. The MELD system uses three laboratory values (bilirubin, creatinine and INR) to calculate a score that is predictive of the risk of death within three months on the liver waiting list. Livers are allocated to waitlisted patients with chronic liver disease based upon this score. See Pediatric End Stage Liver Disease (PELD) Scoring System.