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Leukotriene E4, 24-Hour Urine

Test Code
LAB3517


Alias/See Also
1232600030


CPT Codes
82542

Preferred Specimen
24 Hour Urine 


Patient Preparation
Patients taking 5-lipoxygenase inhibitor zileuton (Zyflo) may have decreased concentrations of leukotriene E4 (LTE4). If possible, discontinue 48 hours prior to collection.

Minimum Volume
All urine produced during that time.


Instructions
From a well-mixed 24-hour collection transfer 5 mL urine to ARUP standard transport tubes (Min: 2 mL). Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
 
Collection duration and urine volume must be provided for testing. Total collection volume must be greater than 300 mL.


Transport Temperature
Frozen (5 mL urine)


Specimen Stability
Room Temperature: 24 hours
Refrigerated: 1 week
Frozen: 28 days



Last Updated: September 8, 2026


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.