Diagnostic Criteria for Diabetes Mellitus and Prediabetes*
Test | Normal | Prediabetes (Impaired Glucose Regulation) | Diabetes |
|---|---|---|---|
FPG (mg/dL [mmol/L]) | < 100 (< 5.6) | 100–125 (5.6–6.9) | ≥ 126 (≥ 7.0) |
OGTT (mg/dL [mmol/L])† | < 140 (< 7.8) | 140–199 (7.8–11.0) | ≥ 200 (≥ 11.1) |
HbA1C (%) | < 5.6 (less than or equal to) | 5.7–6.4 | ≥ 6.5 |
Random glucose (mg/dL [mmol/L]) | < 200 (< 11.1) | — | > 200 (> 11.1) in a patient with symptoms |
* See also American Diabetes Association Professional Practice Committee. 2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes-2025. Diabetes Care. 2025;48(Supplement_1):S27-S49. doi:10.2337/dc25-S002 | |||
† An oral glucose tolerance test is not required and should not be performed if diabetes can be diagnosed by other criteria. When needed, the test should be done using 1.75 g/kg (maximum 75 g) glucose dissolved in water; a positive result is a 2-hour plasma glucose level ≥ 200 mg/dL (11.1 mmol/L). | |||
FPG = fasting plasma glucose; HbA1C = glycosylated hemoglobin; OGTT = oral glucose tolerance test, 2-hour glucose level. | |||