Ordering Recommendation

Not recommended to diagnose diabetes mellitus.

Mnemonic
INS F&T
Methodology

Quantitative Ultrafiltration/Quantitative Chemiluminescent Immunoassay

Performed

Mon, Wed-Sat

Reported

2-3 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Serum separator tube or plain red. Also acceptable: Lavender (EDTA), or pink (K2EDTA).

Specimen Preparation

Transfer 2 mL serum or plasma 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

Reference Interval

Effective August 19, 2013

Test Number
Components
Reference Interval
  Insulin Free 3-19 µIU/mL
  Total Insulin 3-19 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

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