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

Test Details
Days Set Up
Tuesday, Friday
Analytic Time

3 - 7 days

Soft Order Code
USTEK
MiChart Code
USTEK
Laboratory
Sendout
Reference Laboratory
Mayo USTEK
Section
Special Testing
Specimen Requirements
Collection

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

Billing
CPT Code
80299, 83520
NY State Approved
No