CPT® Code 86157

Cold agglutinins are specific antibodies produced by the immune system in response to certain infections. These antibodies can cause red blood cells (RBCs) to clump together, a process known as agglutination, particularly at lower body temperatures. This clumping can lead to significant complications, including the potential for damage or destruction of red blood cells, which may result in a medical condition known as autoimmune hemolytic anemia. The CPT® Code 86157 is specifically designated for the measurement of cold agglutinin titers, which quantifies the concentration of these antibodies in the blood. Elevated titers can be indicative of various medical conditions, including infectious diseases such as mononucleosis, HIV, and atypical pneumonia caused by pathogens like mycoplasma, influenza A or B, parainfluenza, and adenoviruses. Conversely, abnormally low titers may be associated with conditions such as malaria, peripheral vascular disease, and common respiratory disorders. It is important to note that for screening tests to detect the presence of cold agglutinin antibodies, CPT® Code 86156 should be utilized. The testing process involves obtaining a blood sample through venipuncture, which is a separately reportable procedure, and the serum is then analyzed using a semi-quantitative hemagglutination method to determine the titer levels.