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This is a sendout test. Please note that turnaround time is defined as the anticipated time from set up day to results release.
S48576: Tryptophan [30718p] Print View
Date of Birth      
Tryptophan LC/MS  < 30 days: 17 - 85
< 24 months: 16 - 92
< 18 years: 30 - 94
>= 18 years: 40 - 91 
umol/L 

PRIMARY
1 Plasma Heparinized 2 (0.3) mL   Frozen - 30 Day(s)/Refrigerated - 7 Day(s)  
ALTERNATE

Please note: Serum is not an accepted specimen type.
Plasma should be separated from cells as soon as possible after
collection. Freeze plasma below -20 degrees C. Collect plasma
specimens after an overnight fast (or at least 4 hours after meal).
Non-fasting samples are acceptable for pediatric patients.
Setup Schedule
Monday

Reported (Analytical Time)
3 days

CPT Code
82131

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
As soon as serum has been separated, transfer to a polypropylene tube & freeze within 2 hours. Patient should avoid food high in indoles: Avocado, banana, tomato, plum, walnut, pineapple, and eggplant, patient should also avoid tobacco, tea, and coffee 3 days prior to collection. METHODOLOGY: Liquid Chromatography Mass Spectrometry






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