Patients with jaundice and anaemia due to haemolysis require admission.
Patients with raised alkaline phosphatase and GGT are likely to have biliary tract obstruction and should have a USS requested in the ED (with appropriate surgical/GI referral depending on the findings).
Patients with raised AST/ALT have hepatocellular injury and should be admitted if there is evidence of:
Otherwise, outpatient investigation may be appropriate.