Test Details

Mnemonic

CREAS

Ordering Code

3606600

CPT-4 Code(s)

82540

Specimen Information

Collect

Serum separator tube (SST)
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Specimen Preparation

Centrifuge, remove serum from cells within 6 hours of collection and send 1.0 mL serum frozen in a screw capped plastic vial.
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Alternate Specimen

Serum: Red top
Plasma: Green (sodium or lithium heparin)
Lavender EDTA
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Minimum Volume

0.2 mL
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Transport Temperature

Frozen
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Stability

Room temperature: 6 hours
Refrigerated: 7 days
Frozen: 6 months (3 freeze/thaw cycles are acceptable)
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Methodology

Liquid Chromatography/Tandem Mass Spectrometry
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Reference Range

10 years or less: 37.0 - 117.0 ┬Ámol/L
11 years or greater: 9.0 - 90.0 ┬Ámol/L
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Performing Laboratory

ARUP Reference Laboratory
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New York DOH Approval Status

Yes
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