Test Details

Mnemonic

18OHC

Ordering Code

3500245

CPT-4 Code(s)

82542

Specimen Information

Collect

Red top
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Specimen Preparation

Centrifuge, separate serum from cells and send 3.0 mL serum frozen in a screw capped plastic vial.
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Alternate Specimen

SST, Plasma: EDTA or Heparin
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Minimum Volume

1.0 mL
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Transport Temperature

Frozen
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Stability

Room temperature: 1 day
Refrigerated: 1 day
Frozen: 90 days
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Methodology

High-pressure Liquid Chromatography/Tandem Mass Spectrometry (HPLC/MS-MS)
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Reference Range

Age Range (ng/dL)
Premature (26-28w) Day 4 10-670
Premature (31-35w) Day 4 57-410
Full-term Day 3 31-546
31d-11m 5-220
12m-23m 18-155
24m-9y 6-85
10-14y 10-72
Adults 9-58
8:00 AM supine 4-21
8:00 AM upright 5-46
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Performing Laboratory

Esoterix
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