Chromatography/Mass Spectrometry
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Specimen requirements | |
|---|---|
| Patient preparation | None Specified |
| Preferred specimen(s) | 1 mL serum collected in a red-top tube (no gel) |
| Alternative specimen(s) | Plasma collected in: EDTA (royal blue-top) tube, sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube |
| Minimum volume | 0.25 mL |
| Collection instructions | Collect blood in a Vacutainer® with no additives. Allow blood to clot (10-15 minutes) at room temperature. Centrifuge and separate the serum from the cells. |
| Transport container | Transport tube |
| Transport temperature | Refrigerated (cold packs) |
| Specimen stability | Room temperature: 72 hours Refrigerated: 14 days Frozen: 2 years |
| Reject criteria | Hemolysis • Lipemia • Serum separator tube (SST) • Animal specimen |
Pediatric Males
| <30 days | Not established |
| 1 month-17 years | ≤0.5 ng/mL |
| <30 days | Not established |
| 1 month-11 years | ≤0.5 ng/mL |
| 12 years | ≤7.8 ng/mL |
| 13 years | ≤10.7 ng/mL |
| 14 years | ≤12.5 ng/mL |
| 15 years | ≤12.1 ng/mL |
| 16-17 years | ≤11.7 ng/mL |
| 18-29 years | ≤0.3 ng/mL |
| 30-39 years | ≤0.2 ng/mL |
| 40-49 years | ≤0.2 ng/mL |
| 50-59 years | ≤0.2 ng/mL |
| Pre-Menopausal Mid Follicular | ≤0.3 ng/mL |
| Pre-Menopausal Surge | 0.1-1.5 ng/mL |
| Pre-Menopausal Mid Luteal | 6.7-22.2 ng/mL |
| Postmenopausal Phase | ≤0.2 ng/mL |
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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