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94444: Leukotriene E4, U [LTE4] Print View
Leukotriene E4, U   < 105  pg/mg Cr 

PRIMARY
1 Urine 24 hour 4 (1) mL   Frozen - 30 Day(s)/Room Temperature - 24 Hour(s)/Refrigerated - 7 Day(s)  
ALTERNATE
  Urine   Frozen - 30 Day(s)/Refrigerated - 7 Day(s)/Room Temperature - 24 Hour(s)  

An aid to evaluate patients suspected of having systemic mastocytosis.

24 Hour Urine
1. Collect urine for 24 hours.
2. No preservative.

Random Urine
1. Collect a random urine specimen.
2. No preservative.

Urine Preservative collection options:
50% acetic acid
Na2CO3
Toluene
Boric acid.
Setup Schedule
Tuesday, Friday

Reported (Analytical Time)
4 days

CPT Code
82542

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.

Notes
Specimen Requirements: 4 mL (minimum 1 mL) 24 hour or Random Urine collection in Sterile Plastic Container. Rejection Criteria
Ambient Preservatives:
6N HCl 6N HNO3 Thymol
Transport Temperature: Refrigerated Methodology
LTE4: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
AACT: Enzymatic Colorimetric Assay Creatinine always performed but not reported.






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