Lab test
Hemoglobin A1C Testing
The hemoglobin A1c test measures the percentage of hemoglobin in red blood cells that has glucose attached to it, which reflects average blood sugar over roughly the previous two to three months.
- Typical price
- From $29
- Results
- 1-3 business days
- Preparation
- See preparation notes below
- Sample
- Blood draw or sample collection at a local center
About this test
The hemoglobin A1c test measures the percentage of hemoglobin in red blood cells that has glucose attached to it, which reflects average blood sugar over roughly the previous two to three months. It is used to screen for diabetes and prediabetes, to monitor blood sugar control in people with diabetes, and to estimate how well a treatment plan is working. Because it reflects a longer window than a single glucose reading, it is not affected by what a person ate that day. The result is a screening and monitoring tool interpreted by a healthcare provider.
What this test measures
- Hemoglobin A1c (glycated hemoglobin) The percentage of hemoglobin bound to glucose, reflecting average blood sugar over about two to three months.
Who this test may be right for
- Adults being screened for diabetes or prediabetes
- People with diabetes who need to monitor blood sugar control
- Individuals with a family history of diabetes
- Those with risk factors such as obesity, high blood pressure, or metabolic syndrome
- Anyone whose healthcare provider wants to assess long-term glucose control
Before your visit
- No fasting is required for a hemoglobin A1c test
- The sample can be collected at any time of day
- Tell the lab about conditions that affect red blood cells, such as recent transfusion or some anemias
- Follow any instructions provided with your order
Understanding your results
A higher hemoglobin A1c reflects a higher average blood sugar over the preceding months, while a lower value suggests better average glucose control. Results are generally grouped into ranges that indicate normal, prediabetes, or diabetes-level average glucose, though the exact categories are determined by a healthcare provider. A1c can be affected by conditions that change red blood cell lifespan, so it is interpreted with other information. Discuss your A1c result with a healthcare provider, who can explain what it means for you.
Order this test online
- Buy online in a few minutes - no doctor's visit needed for most tests.
- Sample collection at a patient service center near you.
- Results are typically ready within 1-3 business days.
- Secure, lab-reviewed results delivered to your account.
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Questions people ask
What does the hemoglobin A1c test measure?
It measures the percentage of hemoglobin A1c, which reflects average blood sugar over about two to three months rather than a single moment in time.
Do I need to fast for an A1c test?
No. The hemoglobin A1c test does not require fasting and can be collected at any time of day.
Can anything change my A1c result besides blood sugar?
Yes. Conditions that affect red blood cell lifespan, such as recent transfusion or certain anemias, can influence the measured hemoglobin A1c. A healthcare provider interprets the result with this in mind.
What does the Hemoglobin A1C Testing measure?
The hemoglobin A1c (glycated hemoglobin) test measures how well diabetes is being controlled.
Do I need to fast before this test?
Follow the lab's instructions.
How long do results take?
Most Hemoglobin A1C Testing results are released in 1-3 business days. Specialty testing can take longer.
Is this test right for me?
This page is educational and not medical advice. Talk to a licensed healthcare provider about which tests fit your situation.
LabBookings is an independent directory. We compare test details and pricing information, but we are not a laboratory and we do not perform testing or provide medical advice. Always talk to a licensed healthcare provider about your results and treatment.
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