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Cortisol, Free, LC/MS : 36423

Test Code
CORFRQ 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)


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



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.