Preoperative coagulation testing of aPTT and prothrombin time are generally discouraged, as contemporary evidence shows coagulation testing is a poor predictor of bleeding and may lead to unnecessary delays in surgery.8 Instead, preoperative coagulation studies should be reserved for selected patients, especially those with active bleeding and history of a bleeding disorder.9,10 Although test utilization practices are changing in response to current evidence, preoperative coagulation testing may still be ordered, and providers must be familiar with the workup of abnormal coagulation values. The gene discussed is F2; the disease is hemorrhagic disease.