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Cortisol, Free, Serum

Reporting Name

Cortisol, Free, S
National University Hospital-Singapore Note:

For NUH patients - use Epic to order (LAB3053096)
NUH service code - 37182
Mayo test code - CORTF


Additional Testing Requirements


 



Necessary Information


Include time of collection.



Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1.25 mL

Collection Instructions:

1. Morning (8 a.m.) specimens are preferred. The 8 a.m. cortisol can be referred to as the a.m. cortisol and can be collected any time between 6 a.m. and 10:30 a.m. in the morning.

2. Centrifuge and aliquot serum into a plastic vial.

Additional Information: If multiple specimens are collected, send a separate order for each specimen.


Secondary ID

65423

Useful For

Assessment of cortisol status in cases where there is known or a suspected abnormality in cortisol-binding proteins or albumin

 

Assessment of adrenal function in the critically ill or stressed patient, thus preventing unnecessary use of glucocorticoid therapy

Method Name

Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)

Specimen Type

Serum Red

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Red Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reject Due To

Gross hemolysis Reject
Gross lipemia OK
Gross icterus Reject

Reference Values

6-10:30 a.m. Collection: 0.121-1.065 mcg/dL

Day(s) Performed

Tuesday, Thursday, Friday

Report Available

2 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

82530

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CORTF Cortisol, Free, S 2145-1

 

Result ID Test Result Name Result LOINC Value
65423 Cortisol, Free, S 2145-1
National University Hospital-Singapore Additional Information:

Updated on 21/03/2022