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HelpTest ID HBA1C Hemoglobin A1c, Blood
Useful For
Evaluating the long-term control of blood glucose concentrations in patients with diabetes
Diagnosing diabetes
Identifying patients at increased risk for diabetes (prediabetes)
This assay is not useful in determining day-to-day glucose control and should not be used to replace daily home testing of blood glucose.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Whole Blood EDTASpecimen Required
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions: Send specimen in original tube. Do not aliquot.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole Blood EDTA | Refrigerated (preferred) | 7 days |
| Frozen | 7 days | |
| Ambient | 24 hours |
Reference Values
4.0-5.6%
<18 years: Hemoglobin A1c criteria for diagnosing diabetes have not been established for patients who are <18 years of age.
≥18 years: Increased risk for diabetes (prediabetes): 5.7-6.4%
Diabetes: ≥6.5%
Interpretive information based on Diagnosis and Classification of Diabetes Mellitus, American Diabetes Association.
Day(s) Performed
Monday through Sunday
CPT Code Information
83036
Report Available
Same day/1 dayReject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Forms
If not ordering electronically, complete, print, and send a Kidney Transplant Test Request with the specimen.