Enzymatic
The analytical performance characteristics of this assay have been determined by Quest Diagnostics. The modifications have not been cleared or approved by the 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 serum separator tube (SST), received spun |
| Alternative specimen(s) | Plasma collected in: EDTA (lavender-top) tube |
| Minimum volume | 0.5 mL |
| Transport container | Serum separator tube (SST) |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 7 days Refrigerated: 7 days Frozen: 28 days |
| Reject criteria | Hemolysis • Anticoagulants other than EDTA • Unspun red-top tubes |
| Age | Male (mcg/mL) | Female (mcg/mL) |
| ≤1 year | Not established | Not established |
| 2-17 years | 15.0-38.0 | 11.2-35.7 |
| ≥18 years | 7.3-36.6 | 7.5-28.4 |
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.
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