| Categories of increased risk (formerly prediabetes) | Fasting glucose test: 100 to 125 mg per dL (5.6 to 6.9 mmol per L) | — |
| Two-hour OGTT (75-g load): 140 to 199 mg per dL (7.8 to 11.0 mmol per L) |
| A1C measurement: 5.7 to 6.4 percent |
| Type 1, type 2, LADA, MODY | Fasting glucose test: ≥ 126 mg per dL (7.0 mmol per L) | Type 1 diabetes: decreased C peptide, presence of GADA and ICA LADA: increased C peptide, presence of GADA and ICA, tyrosine phosphatase antibody (IA-2), anti-insulin antibody MODY: genetic testing
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| Two-hour OGTT (75-g load): ≥ 200 mg per dL (11.1 mmol per L) |
| Random glucose test: ≥ 200 mg per dL with symptoms |
| A1C measurement: ≥ 6.5 percent |
| Gestational diabetes | OGTT (100-g load): Fasting, 95 mg per dL (5.3 mmol per L) One hour, 180 mg per dL (10.0 mmol per L) Two hour, 155 mg per dL (8.6 mmol per L) Three hour, 140 mg per dL Need at least two abnormal results
| One-hour Glucola OGTT (50-g load): |
| OGTT (75-g load): Fasting, 95 mg per dL One hour, 180 mg per dL Two hour, 155 mg per dL
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