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Anything But Routine
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Esoterix, Inc. - Laboratory Services      Esoterix Mosaic
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Test Code Procedure
803770 Infliximab Concentration and Anti-Infliximab Antibody
CPT Code
80299; 82397
Specimen Requirement
2 mL serum in a red-top tube or tiger-top (SST) tube. Separate serum within 45 minutes of collection, transfer into a plastic transport tube. Ship frozen on dry ice (preferred) or refrigerated.
Pediatric Minimum
1 mL serum in a red-top tube or tiger-top (SST) tube. Separate serum within 45 minutes of collection, transfer into a plastic transport tube. Ship frozen on dry ice (preferred) or refrigerated. Note: This volume does not allow for repeat testing.
Methodology Performing Location
Electrochemiluminescence immunoassay (ECLIA) Endocrine Sciences
Assay Schedule Result Turnaround Time
M-F As Needed
Reference Range
Infliximab drug level: Quantitation Limit: <0.4 µg/mL. Result ≥0.4 µg/mL indicates detection of infliximab. In the presence of anti-infliximab antibodies, the infliximab drug level reflects the antibody-unbound fraction of infliximab concentration in serum. Anti-infliximab antibody: Quantitation Limit: <22 ng/mL. Result ≥22 ng/mL indicates detection of anti-infliximab antibodies.

PLEASE NOTE: CPT codes are to provide guidance. These codes are subject to change on a regular basis and it is the client’s responsibility to verify accuracy of the codes listed. You should refer to the most current version of the CPT coding manual published by the American Medical Association to resolve any issues.

*** Indicates assay performed by third party reference laboratory.

Assay Schedule: The specific day a specimen must be received in order to make the soonest available run. Please note the assay schedules are provided as general approximations for estimating turnaround times, but are subject to change without notice.

Result Turnaround Time: The ranges published for result turnaround time indicate the shortest possible turnaround time to the longest possible result turnaround time as determined by the assay schedule.  Please note that the result turnaround times are provided as general approximations, do not include holiday closures and are subject to change without notice.

PLEASE NOTE: Test information on this website may not apply to Clinical Trials testing.  If you have questions regarding Clinical Trials testing information please contact 877-788-8861, or visit the Clinical Trials website, www.esoterixtrials.com

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