Overview
The following blood tests help your healthcare provider diagnose Type 2 diabetes:
- Fasting plasma glucose test: This lab test checks your blood sugar level. You typically need to get this test in the morning after an eight-hour fast (nothing to eat or drink except water). A result of 126 mg/dL or higher means you have diabetes.
- Random plasma glucose test: This lab test also checks your blood sugar, but you can get it at any time without fasting. A result of 200 mg/dL or higher means you have diabetes.
- A1C test: This lab test measures your average blood sugar levels over the past two to three months. A result of 6.5% or higher means you have diabetes.
In some cases, your provider may order an autoantibody blood test to see if you have Type 1 Diabetes instead of T2D.
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