LFTs
AST, ALT > 1000s
Elevated bilirubin
Elevated alk phosphatase
INR
Coagulopathy
Consider acetaminophen level
Acute hepatitis panel
AST, ALT > 1000s
Elevated bilirubin
Elevated alk phosphatase
Coagulopathy
Ischemic hepatitis
Acetaminophen toxicity 
Viral hepatitis
Autoimmune hepatitis
Hepatitis A
Acute alcoholic hepatitis
Hepatitis B
Acute hepatitis