Test ID: ZG173
CPT code: 83835, 82570
LOINC:
Specimen Type: Random urine, no preservative or 6N HCl
Frequency: 3 – 7 days
Instructions: 10 mL Urine from Random urine transport tube with no preservative or 6N HCl., Ambient. Min 2.5 mL.
Text: Diagnoses the presence of a pheochromocytoma, neuroblastoma, and ganglioneuroblastoma. Simultaneous measurement of urine creatinine permits expression of the metanephrine:creatinine ratio. Some clinicians use >2.2 μg metanephrines/mg creatinine to distinguish pheochromocytoma from normal with this ratio.
Methodology: Metanephrines: liquid chromatography/tandem mass spectrometry (LC/MS-MS); creatinine: alkaline picric acid