Major recommendations: For ASA grade 1 or 2 patients undergoing minor surgery, do not routinely offer preop tlab tests. For ASA grade 3 or 4, consider renal function testing in patients at risk of acute kidney injury. For ASA grade 1 patients undergoing intermediate surgery do not routinely offer any preop lab tests. For all patients undergoing major or complex surgery, offer preop lab testing with CBC counts and renal function. Consider coagulation testing in ASA grade 3 or 4 patients with chronic liver disease or taking anticoagulants. Click here to read full text.