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General Information:

Web Links:

Mayo Clinic Laboratories

Test Code LAB0208561 Cortisol, Plasma or Serum

Methodology

Chemiluminescent Microparticle Immunoassay

Performing Laboratory

CentraCare Laboratory Services

Specimen Requirements

Specimen Type: Plasma

Container/Tube:

Preferred: Green top (Lithium heparin/PST)

Acceptable:  Serum(Gold/SST), Na Heparin Plasma (label specimen appropriately)

Specimen Volume: 0.5 mL

Minimum:  0.25 ml

Collection Instructions: Morning (before 10 a.m.) and afternoon (after 5 p.m.) specimens are desirable.
Additional Information:

1. Include time of draw on request form.
2. If multiple specimens are drawn, send separate request form for each specimen.

Specimen Transport Temperature

Refrigerated

Reference Values

Before 10 a.m.: 3.7-19.4 ug/dL
After 5 p.m.: 2.9-17.3 ug/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

82533