Cortisol, Free and Cortisone, 24-Hour Urine : 1016748

Test Code

UCCF24 or 1016748

CPT Codes
82530, 82542, 82570

Includes

Creatinine.

Instructions

24-hour urine. Refrigerate 24-hour specimen during collection.

Transport Container

Transport one 10 mL aliquot of urine from a well-mixed 24-hour collection. (Min: 2.6 mL) Record total volume on transport container and test request form. 24-hour Urine preserved with 10 grams of Boric acid will be accepted but not required.

Transport Temperature

Refrigerated.

Specimen Stability

Ambient: 14 days; Refrigerated: 21 days; Frozen: 90 days

Methodology
Liquid Chromatography, Tandem Mass Spectometry

Setup Schedule

Monday - Friday

Report Available

2-6 days (From receipt at performing laboratory)

Limitations

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.

Reference Range

Cortisol, Free, Urine:
Adult: 4.0-50.0 µg/24 hrs
Pediatric:
1-4 Years: 0.9-8.2 µg/24 hrs
5-9 Years: 1.0-30.0 µg/24 hrs
10-13 Years: 1.0-45.0 µg/24 hrs
14-17 Years: 3.0-55.0 µg/24 hrs

Cortisone, 24 hr Urine:
Adults: 23-195 µg/24 hrs

Creatinine, 24-Hour Urine
< 3 years Not established
3-8 Years 0.10-0.80 g/24 h
9-12 Years 0.20-1.40 g/24 h
13-17 Years 0.40-1.90 g/24 h
> 17 years 0.50-2.15 g/24 h

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

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.