Cortisol, Free
Test Mnemonic
FRCORT
CPT Codes
- 82530 - QTY (1)
LOINC ®
2145-1
Aliases
- Cortisol, Free by Equilibrium Dialysis/LC-MS/MS
- Hydrocortisone, Free
Includes
- Free Cortisol Serum
Performing Laboratory
ARUP
FDA Category
Laboratory Developed Test
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Frozen | Recommended collection times are 8 - 10 a.m. or 4 - 6 p.m. Remove serum from cells and freeze within 2 hours of collection. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | EDTA (Lavender) | Frozen | Recommended collection times are 8 - 10 a.m. or 4 - 6 p.m. Remove plasma from cells and freeze within 2 hours of collection. | |
| 1 mL | Serum | No additive (Red) | Frozen | Recommended collection times are 8 - 10 a.m. or 4 - 6 p.m. Remove serum from cells and freeze within 2 hours of collection. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.6 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from cells: Unacceptable |
| Refrigerated | After separation from cells: 1 week |
| Frozen | After separation from cells: 6 months |
Days Performed
Sun, Tue, Thu, Fri
Turnaround Time
3 - 6 days
Methodology
| Name | Description |
|---|---|
| Equilibrium Dialysis | |
| Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
Reference Range
| Cortisol, Free | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| 18 Years | 99 Years | Normal | 8:00-10:00 am: 0.21 - 1.04 | ug/dL | 18 Years | 99 Years | Normal | 4:00- 6:00 pm: 0.10 - 0.63 | ug/dL | Years | 17 Years | Normal | Not established |
Special Info
Indicate time of draw on test request form and specimen tube. Grossly hemolyzed, icteric, lipemic or heparinized specimens are unacceptable. This test is New York DOH approved.
Clinical Info
Screen, diagnose, and monitor diseases associated with excess or deficient cortisol production. To convert to nmol/L, multiply ug/dL by 27.6.