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Ordering Code	7795
Test Name	Ustekinumab with Antibodies
Alias	Ustekinumab Quantitation with Antibodies, Serum Stelara Stelara antibodies
Preferred Specimen	Serum
Preferred Container	SST (Gold)
Other Specimen/Container	Serum in Plain (Red)
Optimum Volume	1 mL
Collection Instructions	Collect immediately before the next dose of drug administration (trough level).
Handling Instructions	Separate serum promptly.
Transport Requirements	Oahu: Refrigerated Airline: Refrigerated
Specimen Stability	Ambient: Not Stable Refrigerated: 21 Days Frozen: 21 Days
Rejection Criteria	Heat Inactivated specimen
Avail. Stat	NO
Analytic Time	7 Days
Methodology	Enzyme-Linked Immunosorbent Assay (ELISA)
Reference Lab	Mayo Medical Lab

Reference range(s)

The reference ranges listed below are valid on this date of March 31, 2025.

Component	Age	Male Norm	Male Critical Low	Male Critical High	Female Norm	Female Critical High	Female Critical Low	Units	Add'l info
Ustekinumab QN	ALL							mcg/mL	See report.
Ustekinumab Ab	ALL	<10			<10			AU/mL