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Phenylalanine and Tyrosine Plasma

Laboratory : Metabolic Lab

Test ID/Workstation :
Specimen Type:
Tube Type:
Green top tube- Lithium heparin is preferred. Sodium heparin is acceptable. NO GEL Tubes
Collection Volume:
1.0 mL (minimum 0.4 mL)
Liquid Chromatorgraphy-Tandem Mass Spectrometry (LC-MSMS)
Special Instructions:
Please have patient fast a minimum of 4 hours prior to collection. Specimens must be centrifuged and separated within 2 hours of collection. Collect Sunday - Thursday Only
3-5 days
Additional Info:
Reference range: Phenylalanine Premature: 98-213 uMol/L; 0 to 31 days: 38-137 uMol/L; 1 to 24 months: 31-75 uMol/L; 2-18 years: 26-91 uMol/L; > or = 19 years: 35-85 uMol/L; Tyrosine Premature: 147-420 uMol/L; 0 to 31 days:55-147 uMol/L; 1 to 24 months: 22-108 uMol/L; 2-18 years: 24-115 uMol/L; > or = 19 years: 34-112 uMol/L
CPT Code:
84030, 84510
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