CPT® Code 85384

The CPT® Code 85384 refers to a laboratory test that measures fibrinogen activity, which is a critical component in the blood coagulation process. Fibrinogen, also known as factor I, is a protein synthesized by the liver and plays a vital role in the formation of blood clots. During the clotting cascade, fibrinogen is converted from its soluble form into insoluble fibrin threads, which are essential for stabilizing the site of injury and halting bleeding. The fibrinogen activity test specifically evaluates the functionality of the fibrinogen present in the bloodstream, providing insights into the body's ability to form clots effectively. This test is often performed in conjunction with the fibrinogen antigen test (CPT® Code 85385), which quantifies the actual levels of fibrinogen circulating in the blood. Together, these tests are instrumental in diagnosing and monitoring conditions related to abnormal bleeding or thrombotic events. They are particularly useful in cases where patients exhibit unusual bleeding patterns, have abnormal results in bleeding time tests such as prothrombin time (PT) or activated partial thromboplastin time (PTT), or possess a family history of hereditary fibrinogen deficiencies. Additionally, these tests may be utilized to evaluate an individual's risk for developing cardiovascular diseases. The procedure involves obtaining a blood sample through venipuncture, which is reported separately, and the analysis is conducted on platelet-poor plasma using electromagnetic mechanical clot detection methods.