Fibrosis 4 Score The Fibrosis 4 score is a non-invasive scoring system based on several laboratory tests that help to estimate the amount of scarring in the liver. This score has been studied in liver disease due to Hepatitis C and NASH. ( Age x AST ) / ( Plts x ( sqr ( ALT ) ) Previous Next Years u/L u/L 10^9/L (20074094)(19523535) Bibliography