CPT® Code 85612

The CPT® Code 85612 refers to the Russell viper venom time (RVVT) test, which is a specialized laboratory procedure used to assess blood coagulation. This test involves obtaining a blood sample from the patient, which is then subjected to analysis using undiluted Russell viper venom as an activating agent. The primary purpose of the RVVT is to detect deficiencies in specific blood clotting factors that are crucial for normal coagulation processes. By measuring the clotting time, healthcare professionals can identify potential bleeding disorders or coagulation abnormalities. The undiluted nature of the venom used in this test distinguishes it from the diluted version, CPT® Code 85613, which is designed to detect the presence of lupus anticoagulants—nonspecific inhibitors that can interfere with the clotting process. The RVVT is an important diagnostic tool in the evaluation of patients with unexplained bleeding or thrombotic events, providing critical information for appropriate management and treatment strategies.