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Diabetes is not diagnosed by the symptoms it causes. You must have a test to measure blood glucose to find out if you have diabetes.
Fasting
Casual
Diabetes
126 mg/dL or higher on two occasions
200 mg/dL or higher (with symptoms)
6.5 percent or higher
"Pre Diabetes"
100-125 mg/dL (IFG: when your blood glucose is too high in the morning)
140-199 mg/dL (IGT: when your blood glucose is too high during the day)
5.7 to 6.4 percent
Normal less than
less than 100 mg/dL
less than 140 mg/dL
4 to 6 percent
IFG stands for impaired fasting glucose. IGT stands for impaired glucose tolerance.
Note: We used the word glucose instead of the word sugar so it does not get it confused with the sugar in food.
First published: 12/01/2006 Last updated: 10/25/2011
Reviewed by: Allina Patient Education experts