Test Directory

Clear All
Test Code
IODIN
Test Name
Iodine, Serum or Plasma
CPT Codes
83018
Expected Turnaround Time
2 - 4 days
Clinical Utility

This test is used to monitor exposure to iodine and evaluate for iodine deficiency disorders (IDDs), excessive iodine intake or iodine in the workplace.
Specimen and Container Info

Specimen Type: Serum

Alternate Specimen Type: Plasma

Collection Container: Royal Blue Top (No Additive)

Alternate Collection Container: Royal Blue Top (EDTA)  

Desired Specimen Volume: 0.5 mL
Collection Instructions
  1. Collect royal blue top tube (no additive) or royal blue top tube EDTA via venipuncture.
Processing and Submission Instructions
  1. Separate serum or plasma from cells immediately after collection.
  2. Transfer 0.5 mL of serum or plasma to certified metal-free aliquot tube.
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

28 days

Refrigerated

28 days

Frozen

28 days

Freeze/Thaw Cycles

 Stable x4
Causes for Rejection
  • Certified metal-free plastic transport tube not submitted
Methodology
Inductively Coupled Plasma - Mass Spectrometry (ICP- MS)
Reference Intervals

See patient report.
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Routine, 4 times per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
© 2026 HNL Lab Medicine. All rights reserved.