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19731: Phenylalanine and Tyrosine (NY) Print View
Date of Birth      
Tyrosine     umol/L 
Phenylalanine     umol/L 
Interpretation      

PRIMARY
1 Plasma Heparinized 0.4 (0.2) mL   Refrigerated - 7 Day(s)/Frozen - 30 Day(s)  
ALTERNATE
  Plasma Lithium Heparin 0.4 (0.2) mL   Frozen - 30 Day(s)/Refrigerated - 7 Day(s)  
  Plasma EDTA 0.4 (0.2) mL   Frozen - 30 Day(s)/Refrigerated - 7 Day(s)  

Phenylalanine and Tyrosine are used in the monitoring of patients with phenylketonuria (PKU) who are on special diets. Tyrosine analysis can also be used for monitoring of patients with tyrosinemia.

Separate plasma from cells as soon as possible and freeze below -20
degrees C.

Patient Preparation:
Collect specimen after an overnight fast (or at least 4 hours after a
meal) if possible. Non-fasting samples are acceptable for pediatric
patients.
Setup Schedule
Tuesday, Thursday

Reported (Analytical Time)
4 days

CPT Codes
84510,84030

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
**This test is for New York patient testing only. For Non-New York patient testing, use test code 26336.**
Transport Temperature: Frozen
Methodology: Chromatography/Mass Spectrometry






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