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Laboratory Test Directory

Infliximab or Biosimilar Activity and Neutralizing Antibody


Name Method Department Units
Infliximab Act & Neutraliz AB Cell Culture
Quantitative Chemiluminescent Immunoassay
Send Out

Specimen Requirements

Serum Spun

Container Type Container Size Specimen Volume

Red tube, (no anticoagulant), No Gel

3 mL 1 mL

Gold tube, (SST) with Gel

3.5 mL 1 mL

Room temperature - 2 day(s)
Refrigerated - 4 week(s)
Frozen - 12 month(s)

Specimen Preparation

  • Centrifuge within 2 hours, separate supernatant and refrigerate
  • Avoid repeated freeze/thaw cycles

Reasons for Rejection

  • Contamination
  • Hemolyzed specimen
  • Icteric specimen
  • Lipemic specimen


Aid in evaluation of secondary response failure to infliximab therapy. Patient Prep: Collect specimens before infliximab treatment.

The Infusion Clinic will wait for notice from the sendout lab as to if the specimen is acceptable or not. If it is not acceptable they will redraw but must do so before they begin infusion therapy. The Infusion Clinic will include a label with the phone number and employee information on it with the specimen. Process this specimen as STAT. An acceptable specimen must not be contaminated, lipemic, icteric, or hemolyzed.


CPT Code

  • 80230