Search our extensive Laboratory Test Directory to find test codes, ordering recommendations, specimen stability information, Test Fact Sheets, and more.
Recommendations when to order or not order the test. May include related or preferred tests.
Preferred first-tier genetic test for confirmation of suspected alpha thalassemia or alpha thalassemia trait. Use to detect common as well as rare and novel deletions or duplications of the alpha globin gene cluster and the hemoglobin Constant Spring (HbCS) variant.
New York DOH Approval Status
Indicates whether a test has been approved by the New York State Department of Health.
This test is New York state approved.
Specimen Required
Patient PreparationInstructions patient must follow before/during specimen collection.
CollectSpecimen type to collect. May include collection media, tubes, kits, etc.
Lavender (EDTA), pink (K2EDTA), or yellow (ACD solution A or B)
Specimen PreparationInstructions for specimen prep before/after collection and prior to transport.
Transport 2 mL whole blood. (Min: 1 mL)
Storage/Transport TemperaturePreferred temperatures for storage prior to and during shipping to ARUP. See Stability for additional info.
Refrigerated. Also acceptable: Ambient.
Unacceptable ConditionsCommon conditions under which a specimen will be rejected.
RemarksAdditional specimen collection, transport, or test submission information.
StabilityAcceptable times/temperatures for specimens. Times include storage and transport time to ARUP.
Expected turnaround time for a result, beginning when ARUP has received the specimen.
10-14 days If reflexed, add 5-7 days.
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
By report
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
Refer to report.
Compliance Category
Laboratory Developed Test (LDT)
Note
Additional information related to the test.
If a concurrent deletion of HBA2 is not identified, PCR and bidirectional sequencing for the HbCS copy number will be performed. Additional charges apply.
Hotline History
N/A
CPT Codes
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
Other names that describe the test. Synonyms.
A globin
Alpha globin gene analysis
Alpha globin mutations
Alpha thalassemia
Alpha Thalassemia (HBA1 and HBA2) Deletion/Duplication with reflex to Hb Constant Spring
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