Y023

Test CODE NAME

Y023

Phenylalanine Monitoring, Plasma

Methodology: Quantitative Liquid Chromatography/Tandem Mass Spectrometry
Performed: Mon-Fri
Reported: 3-6 days
Specimen Required: Collect: Green (sodium or lithium heparin) - 0.5 ml plasma.
Specimen Preparation: Separate plasma from cells ASAP or within 2 hours of collection. Transfer  plasma to
a Standard Transport Tube. 
Storage/Transport Temperature: Frozen. 
Unacceptable Conditions:Hemolyzed specimens. 
Stability: After separation from cells: Ambient: Unacceptable; Refrigerated: 24 hours; Frozen: 1 month
Note: This test is approved for NY . 
Performing Lab 
ARUP Laboratory
CPT Code(s): 82131