Hemoglobin A2, Quantitative

Hemoglobin A2, Quantitative

Test Code

511
83020
511
83020
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.

Clinical Significance

Hemoglobin A2, Quantitative - Differential diagnosis of thalassemia and anemias. In B-thalassemia trait A2 is elevated.

Test Resources

None found for this test
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Test Details

Patient Preparation

Blood transfusions within the last 4 months may affect results.

Methodology

Capillary Electrophoresis

Reference Range(s)

<1 Month<1.0 %
1-3 Months<2.3 %
4-5 Months<2.5 %
6-11 Months<3.0%
1-4 Years<3.2 %
≥5 Years2.0-3.2 %

Alternative Name(s)

A2 Quantitation,Hgb A2,Thalassemia

LOINC® Codes, Performing Laboratory

Service Area must be determined
Blood transfusions within the last 4 months may affect results.

Methodology

Capillary Electrophoresis

Reference Range(s)

<1 Month<1.0 %
1-3 Months<2.3 %
4-5 Months<2.5 %
6-11 Months<3.0%
1-4 Years<3.2 %
≥5 Years2.0-3.2 %

Alternative Name(s)

A2 Quantitation,Hgb A2,Thalassemia
Service Area must be determined

Preferred Specimen(s)

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

Minimum Volume

1 mL

Collection 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

Reject Criteria

Hemolysis • Clotted

Setup Schedule

Service Area must be determined
5 mL whole blood collected in an EDTA (lavender-top) tube
1 mL
Submit 2 EDTA (lavender-top) tubes if a CBC is also being requested
EDTA (lavender-top) tube
Room temperature
Room temperature: 5 days
Refrigerated: 7 days
Frozen: Unacceptable
Hemolysis • Clotted
Service Area must be determined
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

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