Test #


Test CPT Codes

82139, 84510

Phenylketonuria (PKU) Amino Acids (Phenylalanine and Tyrosine only)

Test Type

Biochemical Genetics

Test Disease

Phenylketonuria (PKU)

Test Technology

High Pressure Liquid Chromatography (HPLC)

Clinical Utility

Diagnostic, Follow up

Test Specimen


Requirements :

  • Fasting preferred

  • 3 mL ; Minimum : 0.5 mL

Specimen Collection :

  • Sodium heparin (preferred)

  • Lithium heparin (acceptable)

  • Plasma should be separated within 2 hours of collection

Specimen Shipment and Storage:

  • Plasma should be shipped frozen (-15 to -25 °C)

  • Specimen should not be left at room temperature for more than 2 hours

Test Storage

  • See TRF specimen info/instructions

Turnaround Time (TAT)

48-72 hours, priority given to critically ill patients and infants less than one year of age

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