Diabetes diagnostic thresholds and the confirmation rule (ADA Standards of Care 2026)
ada2026_diabetes@1.0Table 2.1: A1C ≥6.5% (≥48 mmol/mol); FPG ≥126 mg/dL (≥7.0 mmol/L); 2-h PG ≥200 mg/dL (≥11.1 mmol/L) during OGTT; random plasma glucose ≥200 mg/dL (≥11.1 mmol/L) with classic symptoms of hyperglycemia or hyperglycemic crisis. In the absence of unequivocal hyperglycemia, diagnosis requires two abnormal results from different tests ... or the same test at two different time points.
American Diabetes Association Professional Practice Committee, 2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes—2026 (2026) · Table 2.1 Criteria for the diagnosis of diabetes in nonpregnant individuals · source
Not encoded: Type of diabetes (type 1, type 2, other) is not assessed. Conditions that make A1C unreliable (some haemoglobin variants, pregnancy, G6PD deficiency, HIV, anaemia, haemodialysis, erythropoietin; recommendation 2.4 and text) are not checked: A1C results are used as sent. No maximum interval between the two abnormal results is stated by the source and none is applied. Whether the test method is NGSP-certified and whether a fasting sample was truly fasting are asserted by the sender through the analyte name. When two different tests are discordant ADA advises repeating the abnormal test; this entry simply reports one abnormal result.