Use for monitoring patients with an established diagnosis of phenylketonuria (PKU).
Liquid Chromatography-Tandem Mass Spectrometry
New York DOH Approval Status
Green (sodium or lithium heparin).
Separate plasma from cells ASAP or within 2 hours of collection. Transfer 0.5 mL plasma to an ARUP Standard Transport Tube. (Min: 0.25 mL)
After separation from cells: Ambient: Unacceptable; Refrigerated: 24 hours; Frozen: 1 month
Effective November 18, 2019
|0-30 days||30-95 µmol/L|
|1 month - 11 months||30-90 µmol/L|
|1 year and older||30-82 µmol/L|
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
This test is designed to monitor treatment and compliance in PKU patients.
|Component Test Code*||Component Chart Name||LOINC|
- Phenylalanine, Plasma
- plasma phenylalanine