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HelpTest Code LAB90 Glycated Hemoglobin (A1c)
Useful For
Monitoring long-term blood glucose control in individuals with diabetes mellitus
Methodology
Turbidimetric Inhibition Immunoassay (TINIA)
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: Whole blood
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Specimen Minimum Volume: 1 mL
Specimen Transport Temperature
Ambient/Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole blood (EDTA) | Ambient | 3 days |
| Refrigerated | 7 days | |
| Frozen | 6 months |
Reference Values
Normal: 4.0%-6.0%
| Hemoglobin A1c Guidelines | |
|---|---|
| 5.7%-6.4% | Pre-diabetic |
| ≥ 6.5% | Diabetic |
| < 7.0% | Diabetic patient goal |
Elevated levels of HbA1c suggest the need for more aggressive treatment of glycemia. The American Diabetes Association recommends that a primary goal of therapy should be a HbA1c of <7% and that physicians should reevaluate the treatment regimen in patients with HbA1c values consistently >8%.
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
83036