Is a Hemoglobin A1c worth it?
What it costs, whether to test at home or at Quest or Labcorp, and how to read your results - reviewed and updated June 2026.
The short answer
Yes for anyone screening for or managing diabetes. A1c is the single most useful blood-sugar test because it reflects your average glucose over the past 2-3 months in one number - no fasting, no glucose drink, one draw.
Who should order it (and who can wait)
Worth it if you...
- •Adults 35+ or anyone overweight with a family history of diabetes (routine screening)
- •People with prediabetes tracking whether diet and exercise are working
- •Anyone with diabetes checking control between doctor visits (target is usually under 7%)
- •People on a GLP-1 (semaglutide/tirzepatide) who want to document metabolic progress
You can probably wait if you...
- •You checked a normal A1c in the last 3 months - it barely moves faster than that
- •You have a condition that skews A1c (recent transfusion, some anemias) - a fasting glucose or fructosamine may be better
We would rather you order the right test than the most expensive one.
At-home vs Quest vs Labcorp
The most common question we get. The short version: the lab and the result are the same - you are choosing where the blood is drawn.
Walk into a lab
Get drawn at any Quest or Labcorp location - thousands nationwide, often same-day. Best for speed and lowest cost.
At-home draw
A mobile phlebotomist comes to you, where available. Same venous sample, drawn at your kitchen table.
Same result
Whichever you pick, it is run on the same CLIA-certified analyzers with the same reference ranges.
A1c can be run from a fingerstick, but the lab-grade version we use is a venous draw at Quest or Labcorp (or an at-home mobile draw where offered), which is the standard for a diagnosis. No fasting is required, so you can be tested at any time of day.
How to read your results
The markers that matter most and what an out-of-range value can mean. Reference ranges vary by lab, age, and sex.
| Marker | Typical range | What it means |
|---|---|---|
| HbA1c | Under 5.7% = normal | 5.7-6.4% is prediabetes; 6.5% or higher on two tests meets the threshold for diabetes. |
| Estimated average glucose (eAG) | ~117 mg/dL at 5.7% | A translation of A1c into a day-to-day glucose number; ~154 mg/dL corresponds to an A1c of 7%. |
Frequently asked questions
Ready to order your Hemoglobin A1c?
$21.99, physician-authorized, results in 2–4 business days. No insurance or doctor's visit required.
About this guide
Reviewed June 20, 2026. This is general health information, not medical advice, diagnosis, or treatment. Reference ranges vary by laboratory, age, sex, and clinical context - always interpret results with a qualified healthcare provider. Lab analysis is performed at CLIA-certified Quest Diagnostics and Labcorp facilities.