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Test Code VEDOL Vedolizumab Quantitation with Reflex to Antibodies, Serum

Additional Codes


Powerchart: Not Available for Order

MA Cerner: Vedolizumab QN, S

Ordering Guidance

If both quantitation and antibody testing are needed, regardless of the quantitation results, order VEDOZ / Vedolizumab Quantitation with Antibodies, Serum.

Specimen Required

1. Patient Preparation: For 12 hours before specimen collection do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.

2. Nivolumab (Opdivo) must be discontinued at least 4 weeks prior to testing for vedolizumab quantitation in serum.


Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1.5 mL

Collection Instructions:

1. Draw blood immediately before next scheduled dose (trough specimen).

2. Centrifuge within 2 hours of collection.

Secondary ID


Useful For

Assessing the response to therapy with vedolizumab


An aid to achieving desired trough serum levels of vedolizumab


Monitoring patient compliance

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
VEMAB Vedolizumab Ab, S No No

Testing Algorithm

Vedolizumab quantitation will be performed by liquid chromatography-mass spectrometry on all samples. When this test is ordered and vedolizumab results are 15.0 mcg/mL or less, then testing for antibodies to vedolizumab will be performed at an additional charge.


This test includes quantitation and, if appropriate, antibody testing will be performed. The therapeutic thresholds for vedolizumab and optimal concentrations associated with good outcomes are not well established. Currently, the American Gastroenterology Association does not have a formal guideline on optimal thresholds for vedolizumab.

Method Name

VEDOL: Liquid Chromatography-Mass Spectrometry (LC-MS/MS)

VEMAB: Electrochemiluminescent Bridging Immunoassay

Reporting Name

Vedolizumab QN, S

Specimen Type


Specimen Minimum Volume

0.75 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 28 days
  Frozen  28 days

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Reference Values


Vedolizumab lower limit of quantitation: 2.0 mcg/mL



Antibodies to vedolizumab: <9.8 ng/mL

Day(s) Performed

Monday, Thursday

Report Available

7 to 14 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


82397 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
VEDOL Vedolizumab QN, S 90805-3


Result ID Test Result Name Result LOINC Value
602807 Vedolizumab QN, S 90805-3


If not ordering electronically, complete, print, and send 1 of the following with the specimen:

-Gastroenterology and Hepatology Client Test Request (T728)

-Therapeutics Test Request (T831)