Cortisol, Free, LC/MS/MS, Second Void Urine

Test Code

90582

CPT Codes
82530, 82570

Includes

Creatinine, Random Urine

Preferred Specimen

2 mL random urine - no preservative

Minimum Volume

0.5 mL

Instructions

Collect second a.m. urine

Transport Container

Plastic urine container

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 14 days
Refrigerated: 21 days
Frozen: 90 days

Methodology
Colorimetric (C) • Kinetic • Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Sun-Fri

Reference Range

Cortisol,Free,2nd Void Urine

3.5-87.1 mcg/g creat

Creatinine, Random Urine

≤6 Months	2-28 mg/dL
7-11 Months	2-31 mg/dL
1-2 Years	2-110 mg/dL
3-8 Years	2-130 mg/dL
9-12 Years	2-160 mg/dL
>12 Years Male	20-320 mg/dL
>12 Years Female	20-275 mg/dL

Clinical Significance

Urinary free cortisol is useful in the detection of patients with Cushing's syndrome for whom free cortisol concentrations are elevated.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

Last Updated: November 6, 2024

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.