Test Catalog

Test ID: VEDOL    
Vedolizumab Quantitation with Reflex to Antibodies, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Assessing the response to therapy with vedolizumab


An aid to achieving desired trough serum levels of vedolizumab


Monitoring patient compliance

Reflex Tests Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests.

Test IDReporting NameAvailable SeparatelyAlways Performed
VEMABVedolizumab Ab, SNoNo

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

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. The American Gastroenterology Association (AGA) does not have a formal guideline on optimal thresholds for vedolizumab at this time.


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

Method Name A short description of the method used to perform the test

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

VEMAB: Electrochemiluminescent Bridging Immunoassay

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Vedolizumab QN, S

Aliases Lists additional common names for a test, as an aid in searching