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HelpTest Code CORTF Cortisol, Free, Serum
Reporting Name
Cortisol, Free, SPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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
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.
Specimen Minimum Volume
1 mL
Specimen Type
Serum RedSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum Red | Refrigerated (preferred) | 28 days |
| Ambient | 28 days | |
| Frozen | 28 days |
Day(s) Performed
Tuesday, Thursday, Friday
Report Available
2 to 8 daysReference Values
6-10:30 a.m. Collection: 0.121-1.065 mcg/dL
Method Name
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
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 |