Iodine/Creatinine Ratio, Random Urine

• CPT Code: 83789, 82570
• LOINC:
• Specimen Type: Random Urine-No Preservative
• Frequency: Setup: Mon-Fri; analytic time 1 day
• Instructions: 2mLs Random Urine-REF-No Preservative. Clean, plastic urine container with no metal cap or glued insert.
• Text: Monitoring iodine excretion rate as an index of daily iodine replacement therapy. Correlating total body iodine load with (131)I uptake studies in assessing thyroid function.
• Methodology: ICR: Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) CDCR: Enzyme Colorimetric Assay