A1C: What It Is, Test, Levels & Chart - Cleveland Clinic
An A1C test measures the average amount of sugar in your blood over the past few months. Healthcare providers use it to help diagnose prediabetes and Type 2 diabetes and to monitor …
Understanding A1C Test | ADA - American Diabetes Association
What Is the A1C Test? The A1C test can be used to diagnose diabetes or help you know how your treatment plan is working by giving you a picture of your average blood glucose (blood …
The A1C Test: Uses, Procedure, Results - Verywell Health
Dec 25, 2025 · The A1C test, also known as an HbA1C, hemoglobin A1C, glycated hemoglobin, or glycosylated hemoglobin test, is a blood test used to diagnose and monitor diabetes. It …
The A1C Test & Diabetes - NIDDK
The A1C test is a blood test that provides information about your average levels of blood glucose, also called blood sugar, over the past 3 months. The A1C test can be used to diagnose type 2 …
A1C Test for Diabetes and Prediabetes | Diabetes | CDC
May 15, 2024 · The A1C test—also known as the hemoglobin A1C or HbA1c test—is a simple blood test. Your A1C is used to diagnose prediabetes and diabetes, and monitor your progress.
All About the Hemoglobin A1C Test - Healthline
Feb 25, 2025 · What does the A1C test for diabetes measure? An A1C test measures the amount of hemoglobin in the blood that has glucose attached to it. Hemoglobin is a protein found …
A1C test - Mayo Clinic
Feb 22, 2025 · For people living with diabetes, the test checks how well they manage blood sugar levels. The A1C test also is called the glycated hemoglobin, glycosylated hemoglobin, …