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Hemoglobin A2, Quantitative

Test Code
511X


CPT Codes
83020

Preferred Specimen
5 mL whole blood collected in an EDTA (lavender-top) tube


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 Temperature
Room temperature


Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: Unacceptable


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Clotted


Methodology
Capillary Electrophoresis

Setup Schedule
A.M.


Reference Range
 0 Days-1 Month <1.0 %
2-3 Months <2.3 %
4-6 Months <2.5 %
7-12 Months <2.7%
>12 Months 2.2-3.2 %


Clinical Significance
Differential diagnosis of thalassemia and anemias. In B-thalassemia trait A2 is elevated.


Performing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.