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Test Code 24COR Cortisol Free, urine, 24 hr

Additional Codes

Epic Ordering Code LAB382
NBS code LBC00410
Service code 31868

Specimen Requirements

Submit the following:

Container:
24 Hr Urine Container

Preservative types accepted: No preservative

Submit cumulative 24-hour urine collection, or a 20 mL aliquot from the completed collection. For aliquots, record the total 24-hour urine volume on the bottle.

 

NUH Outreach: Submit a 20 mL aliquot from the completed 24-hour collection. Record the total 24-hour urine volume on the aliquot bottle.

Processing Requirements

Centrifuge sample before analysis.

Specimen type: 24hr Urine

Specimen Stability

Specimen Type Urine
Ambient Not available
Refrigerate 14 days
Frozen 30 days

Specimen Condition

Haemolysis Not applicable
Icterus Not applicable
Lipaemia Not applicable
Others Not applicable

Methodology

Chemiluminescent Immunoassay

Days and Times Performed

24 hrs, TAT 1 day

Reference Interval

12 – 486 nmol/day

Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346

Useful For

Screening test for Cushing syndrome.

Update

Last updated 31/07/2026

 

LOINC Code Information

Urine volume, total 3167-4
Cortisol free, urine 15043-3
Cortisol free, urine, 24 hr 32310-5

Alias

24 hours urine

Cortisol, Free