A1C: What It Is, Test, Levels & Chart - Cleveland Clinic
Nov 22, 2022 · 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 …
Hemoglobin A1C (HbA1c) Test: MedlinePlus Medical Test
What is a hemoglobin A1C (HbA1C) test? A hemoglobin A1C (HbA1C) test is a blood test that shows your average level of blood glucose, also called blood sugar, over the past two to three months.
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.
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 sugar) over …
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, hemoglobin A1C or …
Hemoglobin A1c (HbA1c): What to know if you have diabetes or ...
Jun 30, 2025 · When someone with diabetes measures their blood sugar with an at-home blood sugar test, they get a snapshot of their blood sugar level at that moment in time. That number naturally …
Hemoglobin A1c Test: Levels, Normal, High, Low, Chart, Schedule
Jul 18, 2025 · Hemoglobin A1c levels correlate with average levels of glucose in the blood over an approximately three-month time. Normal ranges for hemoglobin A1c in people without diabetes are …
The A1C Test & Diabetes - NIDDK
Health care professionals can use the A1C test alone or in combination with other diabetes tests to diagnose type 2 diabetes and prediabetes. You don’t have to fast before having your blood drawn for …
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 shows your …
HbA1C Test - Procedure, Normal Range, and Benefits
What Is the HbA1C Test? The HbA1C test, or glycated hemoglobin test, is a simple yet powerful tool for diagnosing and managing diabetes. It measures the amount of sugar attached to hemoglobin, the …