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Order Code LAB1109 Cortisol, Serum

Additional Codes

Test Name in EPIC

EPIC Test Code           

Mnemonic

RV CORTISOL

LAB1109

CORT
RV CORTISOL BASELINE LAB841 BSCOR
RV CORTISOL, 15 MINUTE LABCOR15 15COR
RV CORTISOL 30 MIN LAB842 30COR
RV CORTISOL, 45 MINUTE LABCORT45 CORT45
RV CORTISOL,  60 MINUTE LAB843 60COR

 

Useful For

Discrimination between primary and secondary adrenal insifficiency, differential diagnosis of Cushing Syndrome

Specimen Requirements

Special Note: Morning (8 a.m.) and afternoon (4 p.m.) specimens are preferred. If multiple specimens are drawn, send separate order for each specimen.

Specimen Type: Plasma or Serum

Collection Container/Tube:

Preferred: Green-top (lithium heparin) gel tube

Acceptable: Plain, red-top tube or SST

Specimen Volume: 2 mL

Pediatric (minimum) volume: 1.0 mL

 

Specimen Stability

Specimen Type Temperature Stability        
Serum Ambient 4 hours
  Refrigerated (preferred) 5 days
  Frozen 4 weeks

Reference Values

  • Before 10am: 4.45 - 22.7 ug/dL
  • After 5pm: 1.7 - 14.1 ug/dL
  • 10:01am-4:59pm: No established reference range

Specimens with biotin concentrations up to 40 ng/mL demonstrated a less than or equal to 10% change in results. Serum biotin concentrations >40 ng/mL may falsely elevate Cortisol results.

For diagnostic purposes, the results should always be assessed in conjunction with the patient's medical history, clinical examination, and other findings.

Day(s) Test Set Up

Monday through Sunday

Performing Laboratory

Ridgeview Medical Center Laboratory

Methodology

Competitive immunoassay

Test Classification and CPT Coding

82533