Cortisol, Free, LC/MS, Serum
Test Summary
Free cortisol is useful in the detection of patients with Cushing's syndrome for whom free cortisol concentrations are elevated.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
2 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.7 mL
Instructions
N/A
Patient Preparation
N/A
Storage
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
- Room temperature: 48 hours
- Refrigerated: 7 days
- Frozen: 2 years
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top), or PPT potassium EDTA (white-top) tube
Unacceptable Specimens
Gross hemolysis • Serum separator tube (SST)
Order Code
CORTF
EPIC (Premier) Code
LAB3849
Includes
N/A
CPT Code
- 82530
Billing Code
- 670393
CPT Statement
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano CA, 92675
33608 Ortega Highway
San Juan Capistrano CA, 92675
Department
Reference Testing
Reference Range
| Adult | ||||
| 8:00 - 10:00 A.M. | 0.07-0.93 mcg/dL | |||
| 4:00 - 6:00 P.M. | 0.04-0.45 mcg/dL | |||
| 10:00- 11:00 P.M. | 0.04-0.35 mcg/dL | |||
Setup Schedule / Expected Turnaround Time
Sunday - Thursday; Report available: 4 - 8 days
Specimen Collection
Special Instructions
N/A
Preferred Specimen
2 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.7 mL
Instructions
N/A
Patient Preparation
N/A
Storage
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
- Room temperature: 48 hours
- Refrigerated: 7 days
- Frozen: 2 years
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top), or PPT potassium EDTA (white-top) tube
Unacceptable Specimens
Gross hemolysis • Serum separator tube (SST)
Result Information
Methodology
Chromatography/Mass Spectrometry
Testing Laboratory
N/A
Reference Range
| Adult | ||||
| 8:00 - 10:00 A.M. | 0.07-0.93 mcg/dL | |||
| 4:00 - 6:00 P.M. | 0.04-0.45 mcg/dL | |||
| 10:00- 11:00 P.M. | 0.04-0.35 mcg/dL | |||
Setup Schedule / Expected Turnaround Time
Sunday - Thursday; Report available: 4 - 8 days