Hemoglobin A1c with eAG Test
This test measures glycated hemoglobin (HbA1c) along with estimated average glucose (eAG) in a whole blood sample. Quest describes HbA1c testing as a measurement used to help with control of blood glucose levels, following American Diabetes Association recommendations.
About this test
Glycated hemoglobin, or HbA1c, reflects blood glucose exposure over time and is reported here alongside eAG, a related glucose figure calculated from the HbA1c result. Quest states that the American Diabetes Association recommends HbA1c testing twice a year for people with stable glycemia and quarterly for those with poor glucose control, as part of helping to manage blood glucose.
The whole blood sample is collected in an EDTA tube and analyzed using a turbidimetric inhibition immunoassay. Quest notes that interpretive ranges for results are based on American Diabetes Association guidelines, and results are read by a clinician in that context rather than on their own.
Test details
| Quest code | 16802 |
|---|---|
| Methodology | Turbidimetric Inhibition Immunoassay |
| Sample type | 1 mL whole blood |
| Collection | Quest patient service center |
Reference range
<5.7 %
Reference ranges are general guidance. The range printed on your own laboratory report is the one that applies to your result.
Related tests and panels
Quest resources
Additional details
What this test looks at
The test reports HbA1c along with eAG, and both are used to help assess blood glucose control over time rather than at a single moment. Quest also lists this test under names such as A1c, HA1c and Hgb A1c.
Order online and a physician order is included — no doctor's visit and no insurance needed. Your sample is collected at a Quest Diagnostics patient service center.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does this test measure?
It measures glycated hemoglobin (HbA1c) and calculates estimated average glucose (eAG) from that result, using a whole blood sample.
How is the sample collected?
Through a routine blood draw, collected in an EDTA tube for whole blood testing.
Do I need to prepare for this test?
No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.
How often is HbA1c typically tested?
Quest states that the American Diabetes Association recommends HbA1c testing twice a year for people with stable glycemia and quarterly for those with poor glucose control.
What is this test also called?
Quest lists it under names including A1c, HA1c and Hgb A1c.
What does a A1c Hemoglobin with eAG test cost without insurance?
$20. Celio Health's price is a flat cash price and insurance is never billed: the required physician's order is included.