National Registry of Certified Medical Examiners (NRCME) DOT Practice Exam

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What HgbA1C level indicates a diagnosis of diabetes?

4.8%
6.5%
7.9%
10%

The correct answer is: 6.5%

A Hemoglobin A1C (HgbA1C) level of 6.5% or higher is one of the diagnostic criteria used to determine the presence of diabetes. The HgbA1C test measures the average blood glucose levels over the past two to three months, providing a comprehensive view of a person's blood sugar control. Levels below 5.7% are considered normal, with values between 5.7% and 6.4% indicating prediabetes. When the HgbA1C reaches 6.5% or above, it signifies that the blood glucose levels have consistently been high, which is consistent with a diagnosis of diabetes. Values such as 4.8%, 7.9%, and 10% do not reflect the diagnostic threshold for diabetes. A 4.8% level falls within the normal range, while 7.9% and 10% indicate hyperglycemia but only the 6.5% threshold officially qualifies for a diabetes diagnosis. This understanding is crucial for appropriate diagnosis and management in clinical practice.