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Your doctor can diagnose diabetes, prediabetes, and gestational diabetes using blood tests. The blood tests show if your blood glucose level, also called blood sugar, is higher than the range that is healthy for you. Blood tests can also help identify the type of diabetes you have.
Tests for type 1 and type 2 diabetes and prediabetes. A1C test. This blood test, which doesn't require not eating for a period of time (fasting), shows your average blood sugar level for the past 2 to 3 months. It measures the percentage of blood sugar attached to hemoglobin, the oxygen-carrying protein in red blood cells.
Learn about the diabetes diagnosis criteria and various tests used like A1C, Fasting Plasma Glucose (FPG), Oral Glucose Tolerance Test (OGTT), and Random Plasma Glucose Test.
Key points. You’ll need a blood sugar test to find out if you have prediabetes or diabetes. Testing is simple, and results are usually available quickly. Why get tested. Prediabetes and type 2 diabetes often don't have any symptoms. (Type 1 diabetes is different—symptoms can develop quickly and can be severe.)
There are many tests that confirm a diabetes diagnosis, including a fasting plasma glucose test, oral glucose tolerance test, random plasma glucose test, and hemoglobin A1c test.
Diabetes is a chronic condition that needs lifelong management. A variety of tests can diagnose diabetes. Learn about who should get tested, and how.
Diagnosis. Type 2 diabetes is usually diagnosed using the glycated hemoglobin (A1C) test. This blood test indicates your average blood sugar level for the past two to three months. Results are interpreted as follows: Below 5.7% is normal. 5.7% to 6.4% is diagnosed as prediabetes. 6.5% or higher on two separate tests indicates diabetes.
To confirm the diagnosis of type 2 diabetes, your doctor will order a fasting plasma glucose test or a casual plasma glucose. Both of these tests measure the amount of glucose (or sugar) in...
Diagnostic tests include: Glycated hemoglobin (A1C) test. This blood test shows your average blood sugar level for the past 2 to 3 months. It measures the amount of blood sugar attached to the oxygen-carrying protein in red blood cells (hemoglobin).
To make a type 2 diabetes diagnosis, doctors can use several different blood tests. You’ll typically need to be tested at least twice to confirm a diagnosis. Most people are tested for diabetes...