Test Name: CD81


Methodology: Flow Cytometry


Test Description

Staining for CD81 highlights leukocytes and normal plasma cells. It is most often used in the diagnostic work-up of plasma cell neoplasms, where complete or partial loss of CD81 expression is a common finding.


Specimen Requirements

Testing for this antigen is typically performed as a part of the plasma cell neoplasm ad-on panel. For customized testing panels including this antigen, please contact the Medical Director of the Flow Cytometry laboratory.


Storage and Transport

Maintain specimen at room temperature. Do not refrigerate or freeze. Use cold pack for transport, making sure cold pack is not in direct contact with specimen.


Specimen Rejection Criteria

Click here to reference the specimen rejection criteria.


Turn Around Time (TAT): 24 hours


CPT Codes*: 88184, 88185, 88187, 88188, 88189


*The CPT codes provided with our Test Descriptions are based on AMA guidelines and are for informational purposes only. Correct CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed.