Test ID: ZH293
CPT code: 84156, 84166
LOINC:
Specimen Type: 24hr urine container without preservative
Frequency: 3 – 5 days
Instructions: 20-mL aliquot Urine without preservative, Refrigerated. Min 11-mL aliquot.
Text: Work up myeloma, macroglobulinemia of Waldenström, lymphoma, amyloidosis; differentiate between normal renal function, glomerular proteinuria, and tubular proteinuria. Diminished tubular reabsorptive capacity results in a marked increase in urinary excretion of low molecular weight proteins.
Methodology: Protein electrophoresis on agarose media; agarose gel immunofixation (IFE) if reflexed