ARUP's Laboratory Test Directory

0070155: Insulin, Free & Total

Test Mnemonic: INS F&T
Methodology: Chemiluminescent Immunoassay

Performed: Mon, Thu

Reported: 2-6 days

Specimen Required:  
Collect: One 4 mL SST.   Also acceptable: lavender (EDTA), or pink (K2EDTA).

Transport: 2 mL serum or plasma, frozen. (Min: 1.1 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 1.1 mL serum or plasma, frozen.

Remarks: Fasting specimen is preferred.  Reference intervals established for fasting specimens.

Unacceptable Conditions: Hemolyzed or heparinized specimens.  Sodium or fluoride/potassium oxalate plasma.

Stability: After separation from cells: Ambient: 8 hours; Refrigerated: 1 week; Frozen: 1 month

Reference Interval:
 
Insulin, Free By report
Insulin, Total By report

Interpretive Data:
This assay reacts on a nearly equimolar basis with the analogs insulin aspart, insulin glargine, and insulin lispro. To convert to pmol/L, multiply µIU/mL by 6.0.



CPT Code(s):
83525 Insulin, total; 83527 Insulin, free

 

 

 
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