Test Catalog
Xanthine and Hypoxanthine, 24 hr Urine
  • CPT Code: 83789
  • LOINC:
  • Specimen Type: 24 hr urine
  • Frequency: Setup: 1x per week; Analytic time 7 days
  • Instructions: 3mL urine from 24 hr collection, Frozen. (Ref ok) Min 1.0mL. No preservative.
  • Text: Diagnosis / confirmation of xanthinuria; evaluation of low serum or urine uric acids; evaluation of allopurinol treatment in hyperuricemic disorders.
  • Methodology: Liquid Chromatography-Tandem Mass Spectrometry