Test Details
Mnemonic
CREAS
Ordering Code
3606600
CPT-4 Code(s)
82540
Specimen Information
Collect
Serum separator tube (SST)
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.
Alternate Specimen
Serum: Red top
Plasma: Green (sodium or lithium heparin)
Lavender EDTA
Plasma: Green (sodium or lithium heparin)
Lavender EDTA
Minimum Volume
0.2 mL
Transport Temperature
Frozen
Stability
Room temperature: 6 hours
Refrigerated: 7 days
Frozen: 6 months (3 freeze/thaw cycles are acceptable)
Refrigerated: 7 days
Frozen: 6 months (3 freeze/thaw cycles are acceptable)
Methodology
Liquid Chromatography/Tandem Mass Spectrometry
Reference Range
10 years or less: 37.0 - 117.0 µmol/L
11 years or greater: 9.0 - 90.0 µmol/L
11 years or greater: 9.0 - 90.0 µmol/L
Performing Laboratory
ARUP Reference Laboratory
New York DOH Approval Status
Yes