What tests are needed to confirm a diabetes mellitus (DM) diagnosis if unequivocal hyperglycemia is absent?

Updated: Oct 23, 2019
  • Author: Romesh Khardori, MD, PhD, FACP; Chief Editor: George T Griffing, MD  more...
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Answer

If unequivocal hyperglycemia is absent, then HbA1c, FPG, and OGTT results should be confirmed by repeat testing. The ADA recommends repeating the same test for confirmation, since there will be a greater likelihood of concurrence. However, the diagnosis of diabetes is also confirmed if the results of 2 different tests are above the diagnostic thresholds. [2]


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