• Fasting blood glucose of 126 mg/dl and above
  • Anytime (random) blood glucose of 200 mg/dl and above


  • Fasting blood glucose below 100 mg/dl
  • Two-hour glucose tolerance test below 140 mg/dl
    (2 hours after drinking 75 grams of glucose)

Pre-Diabetes (between diabetic and non-diabetic)

  • Fasting blood glucose between greater than or equal to 100 and <126 mg/dl (IFG)
  • Two-hour glucose tolerance greater than or equal to 140 and <200 mg/dl (IGT)
    (2 hours after drinking 75 grams of glucose)

Pre-Diabetes is a condition defined by either Impared Fasting Glucose (IFG) or Impared Glucose Tolerance (IGT). If your patient tests positive for either, the patient has pre-diabetes. People with Pre-Diabetes often have insulin resistance, in which their body tissues do not respond normally to insulin. Many people have no symptoms, and many never develop diabetes, but at least one-third of all people with Pre-Diabetes do get diabetes. Pre-Diabetes can last for 7-10 years before diabetes develops.

In the Fasting Blood Glucose Test, the patient should fast overnight (10-16 hours). A blood value of between equal to 100 and <126 mg/dl on two occasions indicates Impaired Fasting Glucose (IFG).

In the Oral Glucose Tolerance Test, a nonpregnant patient who has fasted overnight drinks 75 g of glucose in an aqueous solution. Blood samples are drawn before the oral glucose load and at 30, 60, 90, and 120 minutes thereafter. If any one of the 30, 60, and 90 minute samples and the 120 minute sample are greater than 200 mg/dL, overt DM is indicated. If the 120 minute sample is between 140 and 199 mg/dl, the patient has Impaired Glucose Tolerance (IGT).