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Test ID: COCRU    
Cortisol/Cortisone, Free, Random, Urine

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NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Useful For Suggests clinical disorders or settings where the test may be helpful

Investigating suspected hypercortisolism, when a 24-hour collection is prohibitive (ie, pediatric patients).


The cortisol to cortisone ratio can assist in diagnosing acquired or inherited abnormalities of 11-beta-hydroxy steroid dehydrogenase.


Diagnosis of pseudo-hyperaldosteronism due to excessive licorice consumption

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDReporting NameAvailable SeparatelyAlways Performed
RCTUCreatinine ConcNoYes
COCORCortisol, Random, UNoYes

Method Name A short description of the method used to perform the test

RCTU: Enzymatic Colorimetric Assay

COCOR: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

Cortisol/Cortisone, Free, Random, U

Aliases Lists additional common names for a test, as an aid in searching

Cortisol Free U
Cortisol, Random, Urine
Cortisol/Cortisone, Random U
Cortisone, Random, Urine
Free Cortisol
Free Urinary Cortisol
Urinary Free Cortisol