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HelpCatalog ID Dexam Dexamethasone, Serum or Plasma by LC-MS/MS
Additional Codes
CPOE: Ref Dexamethasone, Serum or Plasma by LC-MS/MS
DOE: Ref Dexamethasone
CPT Code
80299
Specimen
Gold SST, collect 2 mL blood
1 mL serum (0.5 mL minimum), refrigerated
Rejection Criteria
Room temperature after 2 hours from collection, not centrifuged within 2 hours of collection, insufficient quantity, unlabelled specimen
Interpretative Information
Compliance assessment of dexamethasone suppression testing.
Performing Lab
ARUP Laboratories
Turn-Around-Time
2-5 days
Reference Values
Adults baseline: Less than 50 ng/dL
8:00 AM draw following 1 mg dexamethasone between 11:00 pm and 12:00 am the previous evening: 140 - 295 ng/dL
8:00 AM draw following 8 mg dexamethasone (4 x 2 mg doses) between 11:00 pm and 12:00 am the previous evening: 1600 - 2850 ng/dL