ARUP's Laboratory Test Directory
| 0081059: Testosterone Free, Females or Children |
| Test Mnemonic: TESTOS FR | |
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Methodology: Tandem Mass Spectrometry The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin. Performed: Sun-Sat Reported: 1-4 days |
| Specimen Required: | |
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Collect: One 4 mL SST or green (lithium heparin). Specimen should be collected between 6-10 a.m.
Transport: 1 mL serum or plasma at 2-8°C. (Min: 0.6 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.6 mL serum or plasma at 2-8°C. Remarks: Separate serum from cells ASAP. This test is suggested for women and children due to an improved sensitivity of testosterone by LC-MS/MS. Unacceptable Conditions: EDTA plasma. Stability: After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 2 months |
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| Reference Interval: | ||||
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| Interpretive Data: | |
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The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin.
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| Note: | |
| This test is suggested for women and children due to an improved sensitivity of testosterone by LC-MS/MS. |
| CPT Code(s): | |
| 84402 |