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Geisinger Medical Laboratories Test Catalog
INSULIN, FREE (BIOACTIVE) |
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Geisinger Epic Procedure Code: LAB2541
Geisinger Epic ID: 21471
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SPECIMEN COLLECTION |
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Specimen type: |
Serum (preferred) or plasma. | |
Preferred collection container: |
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Alternate Collection Container: |
3.5 mL gold-top (serum separator) tube
3 mL lavender-top (K2 EDTA) tube
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Specimen required: |
0.5 mL aliquot serum or plasma; minimum 0.3 mL | |
Patient preparation: |
Overnight fasting is required. | |
| SPECIMEN PROCESSING |
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Specimen processing instructions: |
Centrifuge and transfer specimens to clean, plastic, screw-capped vial(s). Transport frozen. | |
Transport temperature: |
Refrigerated (preferred) or frozen. | |
Specimen stability: |
Room Temperature: 12 hours (unacceptable). Refrigerated: 7 days. Frozen: 28 days. | |
Rejection criteria: |
Stability limits exceeded. Room temperature specimen. | |
TEST DETAILS |
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Reference interval: |
1.5-14.9 uIU/mL | |
CPT code(s): |
83527 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Test includes: |
Free insulin. | |
Methodology: |
Immunoassay |
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Synonyms: |
FREINS, Free insulin Insulin (bioactive) Quest test code 36700
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Clinical significance: |
The free insulin measurement is helpful in interpreting blood sugar concentration and its relationship to insulin injections in insulin-treated patients with insulin antibodies. | |