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Labcorp Oklahoma, Inc.
Test Directory


Index:

Insulin Free and Total

Order Name INSULIN FR
Test Number: 3601855
Revision Date 12/12/2022
Test Name Methodology LOINC Code
Free Insulin
Quantitative Ultrafiltration/Quantitative Chemiluminescent Immunoassay 6901-3 
Total Insulin
Quantitative Ultrafiltration/Quantitative Chemiluminescent Immunoassay 20448-7 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2 mL (1.1) Serum Clot Activator (SST or Red No-Gel) Frozen
Instructions Notes: 1.5 mL (Note: This volume Does NOT allow for repeat testing)
Specimen Type: Red-top tube or gel-barrier tube
Specimen Storage: Refrigerated
Specimen Collection: Submit serum in a plastic transport tube
Special Instructions: Testing is performed at Esoterix Endocrinology Laboratory: ES#500226
Specimen Stability: Ambient: 2 days, Refrigerated : 10 days, Frozen: 200 days
GENERAL INFORMATION
Expected TAT 5 - 12 days  
Performing Labcorp Test Code 501561 
Notes Labcorp Test Code: 501561
CPT Code(s) 83525, 83527
Lab Section Reference Lab