Test Details

Mnemonic

INTBG

Ordering Code

3512660

CPT-4 Code(s)

83516 If Interferon - beta is positive, Nab FeronĀ® Neutralizing Antibody Test will be added at an additional charge (86382)

Specimen Information

Patient Preparation

Collect sample at least 8 hours after interferon injection. Verify patient medication therapy duration (Avonex, Rebif, Betaseron). If patient is not on any of these therapies, ordering physician must include why test is needed.

Collect

Serum separator tube (SST)

Specimen Preparation

Centrifuge, separate serum from cells and send 1.5 mL serum in a screw capped plastic vial.

Alternate Specimen

Serum: Red top

Minimum Volume

0.5 mL

Transport Temperature

Refrigerated

Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

Methodology

Multi-Analyte Immunodetection (MAID)
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Reference Range

Negative
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Performing Laboratory

Quest Infectious Disease
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