Test Code LAB61 Cortisol, Plasma or Serum
Additional Codes
45320
Reporting Title
Cortisol Random, Plasma or Serum
Methodology
Roche Diagnostics, Electrochemiluminescence Immunoassay
Performing Laboratory
OhioHealth Laboratory Services-RMH, GMC, MH Core Laboratories
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Plasma
Draw blood in a mint green-top (heparin) gel tube(s). Spin down and send 1 mL of heparinized plasma refrigerated.
Note:
1. Cortisol levels are usually drawn in pairs to detect highest and lowest daily levels; usually morning (8 a.m.) and afternoon (4 p.m.) as indicated with separate test codes.
2. Indicate plasma on request form.
3. Label specimen appropriately (plasma).
Alternate: Required for Siemens Users
Serum
Draw blood in a gold-top serum gel tube(s). Spin down and send 1 mL of serum refrigerated.
Note:
1. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.
2. Cortisol levels are usually drawn in pairs to detect highest and lowest daily levels; usually morning (8 a.m.) and afternoon (4 p.m.) as indicated with separate test codes.
3. Indicate serum on request form.
4. Label specimen appropriately (serum).
Specimen Stability Information
Specimen Type | Temperature | Time |
---|---|---|
Serum or plasma | Refrigerated | 4 days |
Ambient | 24 hours | |
Frozen | 12 months |
Specimen Transport Temperature
Refrigerate/Frozen OK/Ambient OK
Reference Values
No established reference range. Reference values vary with various Cortisol Studies.
There is a significant crossreactivity with the therapeutic drugs corticosterone, methylprednisolone, and prednisolone.
Day(s) Test Set Up
Monday through Sunday; Continuously
Test Classification and CPT Coding
82533