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Test Directory » Insulin, Free (Bioactive)

Test Directory Insulin, Free (Bioactive)

Insulin, Free (Bioactive)

Order Code: INSFR

Test Summary

The free insulin measurement is helpful in interpreting blood sugar concentration and its relationship to insulin injections in insulin-treated patients with insulin antibodies.

Aliases

Specimen Collection

Special Instructions

N/A

Preferred Specimen

0.5 mL serum

Minimum Volume

0.3 mL

Instructions

N/A

Patient Preparation

Overnight fasting is required

Storage

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 12 hours
Refrigerated: 7 days
Frozen: 28 days

Limitations

Insulin analogues may demonstrate non-linear cross-reactivity in this assay. Interpret results accordingly.

Other Acceptable Specimens

Plasma collected in: EDTA (lavender-top) tube

Unacceptable Specimens

N/A

Order Code

INSFR

EPIC (Premier) Code

LAB574

Includes

N/A

CPT Code

83527

Billing Code

670106

CPT Statement

Methodology

Immunoassay (IA)

FDA Status

FDA Approved

Physician Attestation of Informed Consent

N/A

Testing Laboratory

Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano CA, 92675

Department

Reference Testing

Reference Range

Insulin, Free

1.5-14.9 uIU/mL

Insulin levels vary widely in specimens taken from non-fasting individuals.

Insulin analogues may demonstrate non-linear cross-reactivity in this assay. Interpret results accordingly.

Setup Schedule / Expected Turnaround Time

Sunday, Tuesday, Thursday; Report available: 4 - 7 days