Test Details

Mnemonic

DEXAM

Ordering Code

3511995

CPT-4 Code(s)

82542

Specimen Information

Patient Preparation

Draw specimen between 8:00 am and 10:00 am

Collect

Red top

Specimen Preparation

Centrifuge, separate serum from cells. Draw specimen between 8:00 am and 10:00 am and send 0.85 mL serum in a screw capped plastic vial.

Minimum Volume

0.25 mL

Transport Temperature

Refrigerated

Rejection Criteria

Grossly lipemic; gross hemolysis; serum separator tubes

Stability

Room temperature: 72 hours
Refrigerated: 14 days
Frozen: 90 days

Methodology

Chromatography/Mass Spectrometry
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Reference Range

Baseline: <20 ng/dL
1m dexamehtasone overnight:
180 - 550 ng/dL (8:00 am - 10:00 am)
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Performing Laboratory

Quest SJC
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