Amino Acids, QN, CSF

• CPT Code: 82139
• LOINC:
• Specimen Type: CSF from 2nd tube
• Frequency: Setup: Mon-Fri; Analytic time 3 days
• Instructions: 0.2mL CSF in sterile vial Frozen. Collect specimen from second collection vial.
• Text: Useful for Evaluating patients with possible inborn errors of amino acid metabolism, in particular nonketotic hyperglycemia and serine biosynthesis defects, especially when used in conjunction with concomitantly drawn plasma specimens.
• Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)