Test Overview
Test Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Reference Range *

Adults: Baseline <30 ng/dL
8:00 am following 1mg Dexamethasone the previous evening: >100 ng/dL
8:00 am following 8mg Dexamethasone (4x2mg doses) previous day: >800 ng/dL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Tuesday, Thursday
Analytic Time

3 - 6 days

Soft Order Code
DEXA
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo DEXA
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Draw blood in a plain, red-top tube(s). Spin down within an hour of collection, and send 2 mL of serum frozen in a plastic vial. SST is acceptable, but must be aliquoted into a screw capped plastic tube.

    Normal Volume
    2 mL serum
    Minimum Volume
    0.6 mL serum
    Storage Temperature
    Frozen
    Additional Information

    Test sent to Mayo Clinic Laboratories

    Billing
    CPT Code
    80299
    Fee Code
    AB046
    LOINC
    14062-4
    NY State Approved
    No