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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Cortisol, Free, LC/MS, Serum
Test Code36423
CPT Codes
82530
Preferred Specimen
2 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.7 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top), or PPT potassium EDTA (white-top) tube
Transport Container
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 2 years
Refrigerated: 7 days
Frozen: 2 years
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Serum separator tube (SST)
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Sun-Thurs; Report available: 4-8 days
Reference Range
Adult | ||||
8:00 - 10:00 A.M. | 0.07-0.93 mcg/dL | |||
4:00 - 6:00 P.M. | 0.04-0.45 mcg/dL | |||
10:00- 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 Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |