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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.
Method Name
Ion-Exchange High-Performance Liquid Chromatography (HPLC)
Reporting Name
Hemoglobin A1c, BSpecimen 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 Minimum Volume
2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| 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
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
83036
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HBA1C | Hemoglobin A1c, B | 4548-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| HBA1C | Hemoglobin A1c, B | 4548-4 |
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.Report Available
Same day/1 dayNY State Approved
YesForms
If not ordering electronically, complete, print, and send General Test Request (T239) with the specimen.