14 days
High-pressure liquid chromatography (HPLC) tandem mass spectrometry
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Mass spectrometry-based cortisol test. Highly specific for adrenal evaluation.
Serum (preferred) or Plasma
0.5 mL
Gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Strictly frozen, requires own sample container
| Temperature | Period |
|---|---|
| Room temperature | 7 days |
| Refrigerated | 7 days |
| Frozen | 3 years |
| Freeze/thaw cycles | stable x6 |