Feb 5, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry


Cortisol (CORT) Chemistry Lab Test

Name: Cortisol

Test Name: Cortisol

Health Link Test Code: CORT

LIS Test Code: CORT

CPT Code(s): 82533

Methodology: Chemiluminescent Immunoassay

Days Performed: Daily.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Blood

Collection Container: Red cap with yellow ring (SST)

Also Acceptable: Red top

Collection Volume: 4 mL

Pediatric Collection Volume: 1 mL

Stability Ambient:

8 hours

Stability Refridgerated:

14 days removed from cells, clot, or gel

8 hours on gel

Stability Frozen:

30 days

Sample Analyzed: Serum

Testing Volume: 1 mL

Pediatric Testing Volume: 0.25 mL

Specimen Processing:

Centrifuge. If a complete barrier has not formed, transfer cell-free serum to plastic vial. Refrigerate.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.



 AM:  3.7-19.4 ug/dL
 PM:  2.9-17.3 ug/dL

Applies to all ages. 


Cortisol levels may be artificially elevated in patients receiving fludrocortisone, prednisolone or prednisone (which is converted to prednisolone) due to the antibody's cross reactivity with prednisolone.

Interpretation Type: Interpretive Guidelines

Test Limitations:

Results may be affected if patient has developed heterophilic antibodies due to exposure to animal based protein products.