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Phenylalanine and Tyrosine Blood Spot

Laboratory : Metabolic Lab

Test ID/Workstation :
Specimen Type:
Tube Type:
Blood Spot Card only
Collection Volume:
Filter paper must be saturated
Cause for Rejection:
Blood Spot card where filter paper is not saturated with blood. DO NOT USE STATE SCREEN CARD
Liquid Chromatorgraphy-Tandem Mass Spectrometry (LC-MSMS)
Special Instructions:
Please have patient fast a minimum of 4 hours prior to collection. do not allow capillary tube or patient heel to touch the collection card. Allow sample to air dry for 3 hours before sending to laboratory. Filter paper on Blood Spot card must be saturated with blood.
3 days
Additional Info:
Reference range: Phenylalanine 69-182 uMol/L; Tyrosine <30 days: 42-49 uMol/L; > or = 1 month to 16 years: 29-86 uMol/L; > or = 16 years: 21-87 uMol/L
CPT Code:
84030, 84510
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