Test Code Cortisol Cortisol, Plasma
Performing Laboratory
NRL-Chemistry
Methodology
Immunoenzymatic Assay
Specimen Requirements
Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin)
Specimen Volume: 1 mL
Collection Instructions:
1. Morning (8 a.m.) and afternoon (4 p.m.) specimens are desirable.
2. Indicate time of draw.
Reference Values
A.M.
>5 years: 7.0-25.0 µg/dL
P.M.
>5 years: 2.0-14.0 µg/dL
Note: Cortisol is released in a cyclic fashion, typically resulting in a diurnal peak (6-8 a.m.) and nadir (11 p.m.).
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
STAT-1 hour
Routine-shift
Specimen Transport Temperature
Refrigerate
Test Classification and CPT Coding
82533-each