Sum of an individual's liver biopsy scores for steatosis (0-3), lobular inflammation (0-2), hepatocellular ballooning (0-2) and fibrosis (0-4). Score <3 corresponds to NAFLD, 3-4 is borderline NASH, > or equal to 5 corresponds with NASH.

Is a scoring system to differentiate NAFLD vs NASH based on a liver biopsy.