Current ADA criteria for the diagnosis of diabetes include all of the following except:

B. 8-hour fasting plasma glucose of ≥126 mg/dL

C. A single random glucose value of ≥200 mg/dL in a patient with obvious hyperglycemia or hyperglycemic crisis

D. 4-hour glucose of ≥200 mg/dL, during an OGT with a glucose load of 75 g anhydrous glucose in water

ANSWER: D (4-hour glucose of ≥200 mg/dL, during an OGT with a glucose load of 75 g anhydrous glucose in water)



. A1C ≥6.5%. The test should be performed in a laboratory using a method that is NGSP certified and standardized to the DCCT
assay.*



. FPG ≥126 mg/dL (7.0 mmol/L). Fasting is defined as no caloric intake for at least 8 h.*



. 2-h plasma glucose ≥ 200mg/dL (11.1mmol/L) during an OGTT. The test should be performed as described by the WHO, using a glucose load containing the equivalent of 75 g anhydrous glucose dissolved in water.*



. In a patient with classic symptoms of hyperglycemia or hyperglycemic crisis, a random plasma glucose ≥200 mg/dL (11.1 mmol/L).

*In the absence of unequivocal hyperglycemia, result should be confirmed by repeat testing.
 

From: Standards of Medical Care in Diabetes-2013, page s13

Diabetes

Current ADA diagnostic criteria are summarized here. 

Diabetes Diagnosis: Which Criterion is Wrong?