Test Overview
Test Methodology

Enzyme-Linked Immunosorbent Assay (ELISA)

Test Usage

Therapeutic drug monitoring.

Reference Range *

USTEKINUMAB QN, S: Limit of quantitation is 0.3 mcg/mL
In inflammatory bowel disease, at post-induction measurement (week 8), concentrations above 3.5 mcg/mL are associated with good outcomes
For maintenance stages:
Concentrations > or =1.0 mcg/mL are associated with clinical response and clinical remission
Concentrations > or =4.5 mcg/mL are associated with mucosal healing

USTEKINUMAB AB, S: Limit of quantitation is 10 AU/mL
Absent: <10 AU/mL
Present: > or =10 AU/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Tuesday, Friday
Analytic Time

3 - 7 days

Soft Order Code
MiChart Code
Reference Laboratory
Special Testing
Specimen Requirements

Collect trough specimen in Red or SST tube. Spin and aliquot serum into a screw capped plastic tube. Send to Specimen Processing refrigerated

Special Handling

Collect trough specimen in an Red or SST tube.

Normal Volume
0.5 mL serum
Minimum Volume
0.4 mL serum
Storage Temperature
Refrigerated preferred, frozen acceptable
Additional Information

Test sent to Mayo Clinic Laboratories

CPT Code
80299, 83520