Test ID: ZH114
Component(s): Z1553 Free Insulin LOINC: 6901-3, Z6617 Total Insulin LOINC 20448-7
CPT code: 83525, 83527
LOINC:
Specimen Type: Red or SST
Frequency: 5 – 12 days
Instructions: 3 mL Serum from Red or SST, Refrigerated. Min 1.5 mL.
Text: Most patients receiving insulin will eventually form antibodies that bind insulin. These antibodies may affect the activity & metabolism of insulin. Free & total insulin testing measures the fraction of insulin that is bound by antibodies and the total insulin after the removal of antibodies.
Methodology: Chemiluminescent immunometric assay (IMA) after insulin extraction of free and total insulin