Final answer:
For a follow-up appointment to check the history of diabetes, an HbA1c test is usually ordered by a provider to assess the patient's blood glucose management over the past two to three months.
Step-by-step explanation:
If a provider wishes to check on the history of a patient's diabetes during a follow-up appointment, they would most likely order an HbA1c test. This test, also known as the A1C or glycosylated hemoglobin test, measures the average blood glucose levels over the past two to three months and provides an indicator of how well the patient has been managing their diabetes. The HbA1c test is crucial for the long-term control of diabetes mellitus, as it reflects the efficacy of the treatments and lifestyle adjustments that have been made by the patient.