Diabetes blood tests:
• Fasting blood glucose level. Diabetes is diagnosed if it is higher than 126 mg/dL two different times.
• Hemoglobin A1c (A1C) test. Diabetes is diagnosed if the test result is 6.5% or higher.
• Oral glucose tolerance test. Diabetes is diagnosed if the glucose level is higher than 200 mg/dL 2 hours after drinking a special sugar drink.