Test ID: ZG093
CPT code: 82139
LOINC:
Specimen Type: Green-top (sodium heparin)
Frequency: 3 – 6 days five days.
Instructions: 0.5 mL Plasma from green-top (sodium heparin), Frozen. Min 0.15 mL.
Text: Diagnosis and monitoring of inherited aminoacidurias, organic acidurias, and urea cycle defects. May be used as a follow-up confirmatory test to some abnormal newborn screen results. False-negative results can occur, especially when a patient is affected with a mild or intermittent variant of a disorder.
Methodology: Liquid chromatography/tandem mass spectrometry (LC/MS-MS)