A glucose level than is higher than normal may mean you have pre-diabetes, diabetes, or gestational diabetes.
Between 140 and 200 mg/dL is called impaired glucose tolerance. Your doctor may call this "pre-diabetes." It means you are at increased risk of developing diabetes over time.
A glucose level of 200 mg/dL or higher is used to diagnose diabetes.
Serious stress to the body, such as from trauma, stroke, heart attack, or surgery, can raise your blood glucose level. Vigorous exercise can lower your blood glucose level.
Some medicines can raise or lower your blood glucose level. Before having the test, tell your health care provider about any medicines you are taking.