Final answer:
The physician will order a glycosylated hemoglobin (HbA1c) test to test the long-term control of diabetes mellitus.
Step-by-step explanation:
The physician will often order a glycosylated hemoglobin (HbA1c) test to test the long-term control of diabetes mellitus. Hemoglobin A1c is the main fraction of glycosylated hemoglobin that is the hemoglobin to which glucose is bound. The level of hemoglobin A1c reflects the average blood glucose level over the past 4 months, making it a valuable tool in monitoring the long-term control of diabetes.