Test Details
Mnemonic
IOD24
Ordering Code
3800232
CPT-4 Code(s)
83789
Specimen Information
Patient Preparation
Do not collect within 96 hours of administering iodine or gadolinium - base contrast media.
If this test is used in conjunction with the (131)l uptake test, then specimen collection should
begin immediately after the dose of (131)l is given (ie: the patient should void and discard urine
just prior to the (131)l, and all subsequent urine should be collected for the next 24 hours). The
last void should be included in the collection.
If this test is used in conjunction with the (131)l uptake test, then specimen collection should
begin immediately after the dose of (131)l is given (ie: the patient should void and discard urine
just prior to the (131)l, and all subsequent urine should be collected for the next 24 hours). The
last void should be included in the collection.
Collect
24 hour urine (refrigerate during collection)
Specimen Preparation
Mix well and send 10.0 mL urine refrigerated in a screw capped plastic urine container.
Minimum Volume
0.3 mL
Transport Temperature
Refrigerated
Stability
Room temperature: 146 days
Refrigerated: 146 days
Frozen: 146 days
Refrigerated: 146 days
Frozen: 146 days
Methodology
Inductively Coupled Plasma/Mass Spectrometry
Reference Range
Iodine, 24 hour urine
0-17 years: Not Established
≥18 years: 75-851 mcg/24 hour
0-17 years: Not Established
≥18 years: 75-851 mcg/24 hour
Performing Laboratory
Mayo Clinic Laboratories
New York DOH Approval Status
Yes