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Insulin CPT: 83525

Synonyms

Immunoreactive Insulin

Expected Turnaround Time

Within 1-2 days

Specimen Requirements

Specimen

Serum

Volume

0.8 mL

Minimum Volume

0.3 mL (Note: This volume does not allow for repeat testing.)

Container

Red-top tube or gel-barrier tube.

Collection

If a red-top tube is used, transfer separated serum to a plastic transport tube. Avoid hemolysis.

Storage Instructions

Refrigerate

Stability Requirements

Temperature Period
Room Temperature 1 day
Refrigerated 14 days
Frozen 14 days
Freeze/thaw/ cycles Stable x 3

Patient Information

To help evaluate insulin production by the beta cells in the pancreas; to help diagnose the presence of an insulin-producing tumor in the islet cells of the pancreas (insulinoma); to help determine the cause of low blood glucose (hypoglycemia); to help identify insulin resistance, or to help determine when a type 2 diabetic might need to start taking insulin to supplement oral medications.

When you have low blood glucose levels with symptoms such as sweating, palpitations, dizziness, fainting; when you have diabetes and your healthcare practitioner wants to monitor your insulin production; sometimes when it is suspected that you have insulin resistance.

A blood sample drawn from a vein in your arm.

Typically, you will be asked to fast for 8 hours before the blood sample is collected. Occasionally, a healthcare practitioner may do testing when fasting is not possible, such as when a glucose tolerance test is done. In some cases, a healthcare practitioner may request that you fast longer than 8 hours.

Due to high demand we are unable to see walk-in patients for COVID-19 Testing. If you want to get tested please schedule your appointment.