Homovanillic Acid (HVA), 24 hr Urine

• CPT Code: 83150
• LOINC:
• Specimen Type: 24 hr urine
• Frequency: Setup: Mon-Sat: analytic time 2 days
• Instructions: 6mL from 24hr coll. Add 25mL 50% acetic acid at START of collection. Min 2.0mL. Refrigerate. pH must be between 1 and 5.
• Text: Used to screen for catecholamine-secreting tumors in children when accompanied by VMA, monitoring treated neuroblastoma patients, and eval patients with possible inborn errors or catacholamine metabolism.
• Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)