HbA1c, also known as Hemoglobin A1c or A1c, is glycosylated hemoglobin or glycohemoglobin in which the glucose molecule present in the blood non-enzymatically binds to hemoglobin. HbA1c test reflects those RBC that are present in the blood at the time of test and measures average blood glucose concentration over 3-4 months. This gives an indication of long-term blood glucose control which serves as a regular monitoring tool if a person has been diagnosed with diabetes. According to the American Diabetes Association, this test is mandatory for diabetic patients and should be performed four times a year. HbA1c test is available at a discounted rate, along with the home collection.