C. difficile Toxin/GDH w/ Reflex to PCR
Test code: 91664
CPT code(s): 87449, 87324
Methodology: Immunoassay
Includes: If the GDH Antigen is detected and the Toxin A and B are not detected or the GDH Antigen is not detected and the Toxin A and B are detected, Clostridium difficile Toxin B, Qualitative, Real-Time PCR will be performed at an additional charge (CPT code(s): 87493).