Cortisol, free, total with CBG-994

Test info

  
Cortisol, free, total with CBG
  
994
  
LAB994
  
MSO
  
  • Cortisol, total
  • Cortisol-binding globulin (CBG)
  • Free cortisol
  • Percent free cortisol

Specimen

  
Serum
  
  
1.0 mL
  
0.3 mL
  

Immediately following collection, mix sample by gently inverting 5 times

  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin within one (1) hour of sample collection
  3. Transfer serum to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp), labelled as serum
  4. Freeze
  
  
  1. Allow sample to clot
  2. Spin 
  3. Transfer serum to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp), labelled as serum, within one (1) hour of sample collection
  4. Freeze
  

Frozen (preferred) – 1 year

Refrigerated – 1 day

Ambient – 1 day

 

Performance

  
LabCorp Endocrine Sciences (500440): R-NX
  
CBG - Mo, We, Fr
Cortisol - We - Su
Cortisol free - We, Fr
  
6 - 12 days
  

HPLC/tandem mass spectrometry

Radioimmunoassay (RIA)

Calculation of free cortisol

Clinical and Interpretive info

Billing

  
82533
84449

Tracking

  
06/05/2020
  
06/12/2020