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
Refrigerated: 14 days
Frozen: 90 days
Methodology
Chromatography/Mass Spectrometry
Reference Range
Baseline: <20 ng/dL
1m dexamehtasone overnight:
180 - 550 ng/dL (8:00 am - 10:00 am)
1m dexamehtasone overnight:
180 - 550 ng/dL (8:00 am - 10:00 am)
Performing Laboratory
Quest SJC
New York DOH Approval Status
Yes