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Cortisol, Free, LC/MS : 36423
Test CodeCORFRQ or 36423
CPT Codes
82530
Instructions
Plain red or lavender (EDTA) tube.
Transport Container
Centrifuge plain red or lavender and aliquot 2 mL (Min: 0.7 mL) serum or plasma into a standard transport tube.
Transport Temperature
Refrigerated.
Specimen Stability
Ambient: 48 hours; Refrigerated: 7 days; Frozen: 2 years
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature, Serum Separator tube, Gross hemolysis
Methodology
Chromatography/Mass Spectrometry
Setup Schedule
Sunday - Thursday
Report Available
3-7 days (From receipt at performing laboratory)
Limitations
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.
Reference Range
| Adult 8:00 A.M.-10:00 A.M. 0.07-0.93 mcg/dL 4:00 P.M.-6:00 P.M. 0.04-0.45 mcg/dL 10:00 P.M.-11:00 P.M. 0.04-0.35 mcg/dL |
Clinical Significance
Free cortisol is useful in the detection of patients with Cushing's syndrome for whom free cortisol concentrations are elevated.
Performing Laboratory
Quest Diagnostics
