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- Ordering Info
To view specimen requirements and codes please select your laboratory:
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1 mL whole blood collected in each of the following tubes: QFT-Nil control (gray cap, white or gold ring) tube; QFT-TB antigen (red cap, white or gold ring) tube; QFT-Mitogen control (purple cap, white or gold ring) tube
1 mL in each tube
1. For each patient, collect 1 mL of blood by venipuncture directly into each of three unique QuantiFERON®-TB Gold IT blood collection tubes. Tubes must be at room temperature prior to collection. Under or overfilling of the tubes may lead to erroneous results.
2. Shake them ten times just firmly enough to ensure the entire surface of the tube is coated with blood, to solubilize antigens on tube walls.
3. Transport specimen at room temperature to the laboratory immediately or within 16 hours.
Note: Specimen collection locations > 3350 feet above sea level should use the QuantiFERON® collection kit designed for "high altitude" (tubes with a gold ring on tube top).
QFT-Nil control (gray cap, white or gold ring) tube; QFT-TB antigen (red cap, white or gold ring) tube; QFT-Mitogen control (purple cap, white or gold ring) tube
Transport specimen at room temperature to the laboratory immediately or within 16 hours. 72 hours if preincubated. Special sample collection and transportation arrangements must be made prior to ordering the test. Please contact your local quest diagnostics customer service department for specific instructions.
Specimens should be tested as soon as possible
Room temperature: 16 hours (72 hours if pre-incubated)
Received >16 hours old unless pre-incubated • Received >72 hours if pre-incubated • Received refrigerated or frozen • Specimens not collected in Quantiferon®-TB Gold IT blood collection tubes
Bio Assay with IFN-Gamma Detection by Immunoassay
|1737 Airport Way S Suite 200|
|Seattle, WA 98134-1636|
Set up: No draw time restrictions for non-incubated quantiferons collected in alaska and oregon. Seattle lab will accept non-incubated quantiferons collected after 10am if a client or psc does not have an incubator; Otherwise, no draw time restrictions for non-incubated quantiferons collected in washington to include all psc's in tacoma and seamar(First Shift)
|NIL||See Laboratory Report|
|Mitogen-NIL||See Laboratory Report|
|TB-NIL||See Laboratory Report|
tuberculosis is a communicable disease caused by infection with M. tuberculosis complex. Infection results in either acute disease or Latent TB Infection (LTBI), a non-communicable asymptomatic condition. The main purpose of diagnosing the latent stage is to consider medical treatment for preventing overt disease. Until recently, the tuberculin skin test was the only available method for diagnosing LTBI. QuantiFERON®-TB gold eliminates false positive skin test due to BCG vaccination and most Non-Tuberculous Mycobacteria (NTM) and is an objective, reproducible qualitative test. There are no side effects or adverse reactions due to patient hypersensitivity, and no "booster effect", whereby the first test induces a false positive response on re-testing. There is no need for follow-up patient visits to obtain test results.
The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.NOTE: The codes listed in the table below are not orderable Test Codes.
|Result Name||LOINC Code||Component Name|
|40023700||QUANTIFERON(R)-TB GOLD||45323-3||Mycobacterium tuberculosis tuberculin stimulated gamma interferon|
|40023710||NIL||46217-6||Mycobacterium tuberculosis stimulated gamma interferon|
|40023720||TB-NIL||64084-7||Mycobacterium tuberculosis stimulated gamma interferon^^corrected for background|
|40023730||MITOGEN-NIL||46216-8||Mycobacterium tuberculosis tuberculin stimulated gamma interferon/Mitogen stimulated gamma interferon|
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 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 payer being billed.
LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.