Question: What codes should we use to report our lab’s work when the clinician requests an immune dysfunction panel consisting of B and T cell total counts and absolute CD8 and CD4 counts? This is not a “panel” as far as I can tell. Indiana Subscriber Answer: The correct way to code this work is to report the individual tests. You are correct that this not a “panel” code in CPT®, which has a section for codes that represent “organ or disease-oriented panels.” Bill your lab’s work using the following codes: