14 days
High-pressure liquid chromatography (HPLC)/tandem mass spectrometry (MS-MS)
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Measures 21-deoxycortisol to detect 21-hydroxylase deficiency, the most common form of congenital adrenal hyperplasia.
Serum (preferred) or Plasma
1 mL
Red-top tube, gel-barrier tube, or lavender-top (EDTA) 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.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.
| Temperature | Period |
|---|---|
| Room temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
| Freeze/thaw cycles | Stable x3 |