0070155
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Insulin, Free and Total

INS F&T
Example Reports
Abnormal
Normal

Ordering Recommendation

Not recommended to diagnose diabetes mellitus.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Serum separator tube.

Specimen Preparation

Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 1.1 mL)

Storage/Transport Temperature

Frozen. Separate specimens must be submitted when multiple tests are ordered.

Unacceptable Conditions

Heparinized specimens. Sodium fluoride/potassium oxalate plasma. Hemolyzed specimens.

Remarks
Stability

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

Methodology

Quantitative Ultrafiltration/Quantitative Chemiluminescent Immunoassay

Performed

Mon, Wed-Sat

Reported

2-3 days

Reference Interval

Effective August 16, 2021

Test Number
 Components
 Reference Interval
  Insulin Free 3-25 µIU/mL
  Total Insulin 3-25 µIU/mL

Interpretive Data

This test reacts on a nearly equimolar basis with the analogs insulin aspart, insulin glargine, and insulin lispro. Insulin detemir exhibits approximately 50 percent cross-reactivity. Test reactivity with insulin glulisine is negligible (< 3 percent). To convert to pmol/L, multiply µIU/mL by 6.0.

Reference intervals established for fasting specimens.

Compliance Category

FDA

Note

Hotline History

N/A

CPT Codes

83525; 83527

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Components

Component Test Code* Component Chart Name LOINC
0070091 Insulin Free 6901-3
0070092 Total Insulin 20448-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Free and Total insulin
Insulin, Free and Total