An A1C test is a blood draw used to diagnose and manage prediabetes and diabetes. Learn more about who needs this test and why and how it’s performed.

Prediabetes is a condition in which your blood glucose levels are above a typical range ... results are questionable, a doctor will recheck your A1C on another day to confirm the diagnosis. The ...

In a nondiabetic person the glucose level goes down to normal, which is generally 80 ... substances and conditions that interfere with A1C test results. CNN's medical unit brings you the best ...

An MCHC blood test between 32-36 grams per deciliter (g/dL) is considered normal. Results below or above this range could be abnormal, but don't necessarily indicate there's a problem. Your doctor ...

I brought his chart up on the computer screen, and sure enough, there it was: a serum potassium level slightly above the "reference," or normal ... Test results can also fall outside the reference ...

The creatinine blood test helps doctors diagnose kidney disease ... for keeping the creatinine level in the blood within a normal range. Medical professionals define the typical reference ranges ...

The A1C test, also known as an HbA1C ... age 35 whether or not they have risk factors besides age. If your test results are normal, you should repeat testing at least every three years.

C. Ronald Kahn, M.D. President and Director, Joslin Diabetes Center What is the A1c blood test? The hemoglobin A1C test is a measure of what we call long term glucose control. The way this works ...