ARUP's Laboratory Test Directory
| 0070030: Cortisol, Serum or Plasma |
| Test Mnemonic: CORTISOL | |
|
Methodology: Chemiluminescent Immunoassay
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
|
Collect: One 4 mL SST or PST. Also acceptable: green (sodium or lithium heparin).
Transport: 1 mL serum or plasma at 2-8°C. (Min: 0.6 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.4 mL serum or plasma at 2-8°C. Remarks: Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP. Stability: After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 months |
|
| Interpretive Data: | |
|
0800 hours: 6-23 µg/dL 2000 hours: 0-9 µg/dL 8 hours post 1 mg dexamethasone given at midnight: 0-5 µg/dL 30-60 minutes post 25 units Cosyntropin I.V.: > 20 µg/dL |
| Note: | |
| To convert to nmol/L, multiply µg/dL by 27.6. |
| CPT Code(s): | |
| 82533 |