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Cardio IQ® Insulin
Test Code91731
CPT Codes
83525
Preferred Specimen
1 mL serum
Patient Preparation
Overnight fasting is required.
Minimum Volume
0.5 mL
Instructions
Collect blood by venipuncture into plain tubes; separate the serum from the cells.
Unable to add INSULIN testing unless sample was submitted frozen.
Unable to add INSULIN testing unless sample was submitted frozen.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 8 hours
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Plasma • Gross icterus • Received room temperature
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Mon-Sat; Report available: 1-2 days
Reference Range
≤ 18.4 uIU/mL
Risk: (uIU/mL)
Optimal ≤ 18.4
Moderate NA
High >18.4
Risk: (uIU/mL)
Optimal ≤ 18.4
Moderate NA
High >18.4
Clinical Significance
Insulin is useful in diagnosing hyperinsulinemia in hypoglycemic patients. Hyperinsulinemia may be due to an insulin-producing tumor (insulinoma), syndrome of insulin resistance, or persistent hyperinsulinemic hypoglycemia of infancy.
