Cortisol, Serum or Plasma
0070030
 
Ordering Recommendation
Mnemonic
CORTISOL
Methodology
Quantitative Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Serum separator tube or plasma separator tube. Also acceptable: Green (sodium or lithium heparin).  
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.6 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
Saliva (refer to Cortisol, Saliva, ARUP test code 0080117).  
Remarks
 
Stability
After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 months  
Reference Interval
Interpretive Data
0800 hours: 6-23 µg/dL
2000 hours: 0-9 µg/dL
8 hours post 1 mg dexamethasone given at midnight: 0-5 µg/dL
30-60 minutes post 25 units Cosyntropin I.V.: > 20 µg/dL
Note
To convert to nmol/L, multiply µg/dL by 27.6.
CPT Code(s)
82533
Components
Component Test Code*Component Chart Name
0070030Cortisol, Serum or Plasma
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at interface.support@aruplab.com.
Cross References
  • Compound F
  • Corticosteroids
  • Cortisol
  • Cortisol, Serum
  • Cortrosyn Stimulation Test
  • Dexamethasone Suppression
  • Diurnal Corticoids