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Cortisol, Free, 24-Hour Urine with Creatinine, LC/MS/MS
2 mL urine from a 24-hour collection (no preservatives)
25 mL 6N HCl • 10 mL conc. glacial acetic acid • 10 g boric acid
Record 24-hour urine volume on test requisition and urine vial. Reference ranges do not apply to random urine samples.
Plastic screw-cap vial
Refrigerated (cold packs)
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 5 months
Liquid Chromatography, Tandem Mass Spectrometry (LC/MS/MS)
|Quest Diagnostics Nichols Institute-San Juan Capistrano, CA|
|33608 Ortega Highway|
|San Juan Capistrano, CA 92675-2042|
Set up: Mon-Sat a.m.; Report available: 4 days
Urinary Free Cortisol is useful in the detection of patients with Cushing's syndrome for whom Free Cortisol concentrations are elevated.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.