CORTISOL

Specimen Required
Draw blood in a SST. Centrifuge and separate serum from cells within one hour. Send 1.0 mL serum (0.5 mL minimum) refrigerated in a screw-capped plastic vial.

Alternate Specimen
Serum: Red-top

Rejection Criteria
Hemolyzed or lipemic specimens, plasma

Methodology
Immunoassay

Stability
Room Temperature: 48 hours; Refrigerated: 7 days; Frozen: 28 days

Reference Range
0-3 days (Infants)
Premature (31-35 weeks):   a.m. or p.m. <=15.0 mcg/dL  
Term:   a.m. or p.m. <=14.0 mcg/dL  
4 days-1 Month:   a.m. or p.m. Not established  
2-11 Months:   a.m. 3.0-23.0 mcg/dL  
   p.m. Not established  
1-17 years:   a.m. 3.0-25.0 mcg/dL  
   p.m. 3.0-17.0 mcg/dL  
Adult 8 a.m. (7-9 a.m.) specimen 4.0-22.0 mcg/dL
Adult 4 p.m. (3-5 p.m.) specimen 3.0-17.0 mcg/dL

Performed
Tuesday-Saturday

Turnaround Time2-4 days
Test CodeCOR
CPT-4 Code (s)
82533
LOINC Codes
2143-6

Warde
Medical
Laboratory