502

Test CPT Codes

82139, 84510

Test Type

Biochemical Genetics

Test Disease

Phenylketonuria (PKU)

Test Technology

High Pressure Liquid Chromatography (HPLC)

Clinical Utility

Diagnostic, Follow up

Test Specimen

Plasma

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