Test ID: CD40
B-Cell CD40 Expression by Flow Cytometry, Blood
Secondary ID 
A test code used for billing and in test definitions created prior to November 2011
89009
NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.
Conditional
Useful For Suggests clinical disorders or settings where the test may be helpful
Evaluating patients for hyper-IgM type 3 (HIGM3) syndrome due to defects in CD40, typically seen in patients <10 years of age
Assessing B-cell immune competence in other clinical contexts, including autoimmunity, malignancy and transplantation
Method Name A short description of the method used to perform the test
Flow Cytometry
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
CD40 by Flow, QL, B
Aliases Lists additional common names for a test, as an aid in searching
Hyper IgM
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