Dexamethasone
Order Code: DEXA
Epic Lab Code: LAB2995
Order Form: A-1a Miscellaneous Request or Epic Req
Commercial Mail-out Laboratory
6240 RCP
356-3527
Specimen:
Serum
Collection Medium:
Red top tube
Minimum:
Preferred Minimum: 1 mL serum from red top tube Absolute Minimum: 0.5 mL serum from red top tube
Rejection Criteria:
Gel separator tubes
Specimen Instructions:
Suggested collection time is between 6-11 a.m.
Analytic Time:
1 week upon receipt at reference laboratory
Reference Range:
Adults baseline: Less than 50 ng/dL

8:00 AM draw following 1 mg dexamethasone between 11:00 pm and the previous evening: 140-295 ng/dL

8:00 AM draw following 8 mg dexamethasone (4x2 mg doses) between 11:00 pm and 12:00 am the previous evening: 1600-2850 ng/dL
Methodology:
Liquid Chromatography-Tandem Mass Spectrometry
CPT Code:
83789