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Hemoglobin A2, Quantitative (A2)
MessageBlood transfusion within the last 4 months may affect results.
Test Code
LAB2276
Quest Code
511
Alias/See Also
A2
CPT Codes
83020
Preferred Specimen
Whole blood collected in a lavender-top (EDTA) tube.
Submit 2 lavender-top (EDTA) tubes if a CBC is also being requested.
Submit 2 lavender-top (EDTA) tubes if a CBC is also being requested.
Patient Preparation
Blood transfusions within the last 4 months may affect results.
Minimum Volume
1 mL
Instructions
Submit 2 EDTA (lavender-top) tubes if a CBC is also being requested
Transport Container
EDTA (lavender-top) tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: Unacceptable
Refrigerated: 7 days
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Clotted
Methodology
Capillary Electrophoresis
Setup Schedule
Monday through Friday
Report Available
3 days
Reference Range
≤1 Month <1.0 %
3 Months <2.3 %
6 Months <2.5 %
12 Months <2.7 %
>12 Months 1.8-3.5 %
3 Months <2.3 %
6 Months <2.5 %
12 Months <2.7 %
>12 Months 1.8-3.5 %
Clinical Significance
Differential diagnosis of thalassemia and anemias. In B-thalassemia trait A2 is elevated.
Performing Laboratory
Quest Diagnostics - South Region |