What Prediabetic Means. When your blood glucose levels reach a certain level, you have diabetes. When your blood glucose levels reach a certain level, you have diabetes.
Prediabetes means your blood glucose (also called blood sugar) levels are higher than normal. If you have prediabetes, your health care provider will typically check your blood sugar levels at least once a year. 140 to 199 mg/dl (7.8 to 11.0 mmol/l) is consistent with prediabetes.