Cortisol Free, 24 hr Urine

• CPT Code: 82530
• LOINC:
• Specimen Type: 24 hour urine
• Frequency: Setup: Sun-Fri; analytic time 2 days
• Instructions: 5.0mL from 24hr urine. Refrigerate. Preserving with 10g boric acid is preferred, but refrigeration acceptable.
• Text: This is the preferred screening test for Cushing's syndrome. Useful in diagnosis of pseudo-hyperaldosteronism due to excessive licorice consumption. This test has limited usefulness in the evaluation of adrenal insufficiency. Components: Z0158 Cortisol, U; Z0160 Hours, Cortisol; Z0161 T Vol, Cortisol
• Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)