ZAP70, IHC without Interpretation

Test Code

90242

CPT Codes
88342

Preferred Specimen

Formalin-fixed, paraffin-embedded tissue block submitted in an IHC specimen transport kit

Other Acceptable Specimens

3 unstained, (+) positively charged slides

Transport Temperature

Room temperature

Specimen Stability

Room temperature: Indefinitely
Refrigerated: Indefinitely
Frozen: Unacceptable

Methodology
Immunohistochemistry (IHC)

Setup Schedule

Set up: Mon-Fri; Report available: Next day

Clinical Significance

The T-cell kinase ZAP70 is anomalously expressed in the more aggressive, pregerminal center subset of B-cell chronic lymphocytic leukemia and small lymphocytic lymphoma. Expression of ZAP70 by immunohistochemistry is well-correlated with overexpression of ZAP70 by transcript analysis or immunohistochemistry.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.