How to diagnose diabetes - Endocrine Metabolic Medical Center

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How do doctors diagnose diabetes?

The diagnosis of diabetes is done through a blood test. Each test must be confirmed on another day by using any of the three tests below. The new standard for diagnosis is:

Symptoms of diabetes plus a plasma glucose reading of greater than or equal to 200 mg/dl any time of day without regard to time since last meal.
A fasting plasma glucose reading of greater than or equal to 126 mg/dl (fasting is defined as no caloric intake for at least 8 hours).
An oral glucose tolerance test (OGTT) with a two hour postload glucose of greater than or equal to 200 mg/dl.

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Last Updated:01/01/07
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